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Commit | Line | Data |
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288f4aa9 | 1 | /* |
6edbf68a PL |
2 | * This file is part of PowerDNS or dnsdist. |
3 | * Copyright -- PowerDNS.COM B.V. and its contributors | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * In addition, for the avoidance of any doubt, permission is granted to | |
10 | * link this program with OpenSSL and to (re)distribute the binaries | |
11 | * produced as the result of such linking. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | */ | |
870a0fe4 AT |
22 | #ifdef HAVE_CONFIG_H |
23 | #include "config.h" | |
24 | #endif | |
3e61e7f7 | 25 | |
76473b92 KM |
26 | #include <netdb.h> |
27 | #include <sys/stat.h> | |
28 | #include <unistd.h> | |
f097141b | 29 | #ifdef HAVE_BOOST_CONTAINER_FLAT_SET_HPP |
b47026fd | 30 | #include <boost/container/flat_set.hpp> |
f097141b | 31 | #endif |
2470b36e | 32 | #include "ws-recursor.hh" |
c390b2da | 33 | #include <thread> |
519f5484 | 34 | #include "threadname.hh" |
3ea54bf0 | 35 | #include "recpacketcache.hh" |
3ddb9247 | 36 | #include "utility.hh" |
51e2144e | 37 | #include "dns_random.hh" |
d1b28475 KM |
38 | #ifdef HAVE_LIBSODIUM |
39 | #include <sodium.h> | |
40 | #endif | |
3afde9b2 | 41 | #include "opensslsigners.hh" |
288f4aa9 BH |
42 | #include <iostream> |
43 | #include <errno.h> | |
81859ba5 | 44 | #include <boost/static_assert.hpp> |
288f4aa9 BH |
45 | #include <map> |
46 | #include <set> | |
97bb160b | 47 | #include "recursor_cache.hh" |
38c9ceaa | 48 | #include "cachecleaner.hh" |
288f4aa9 | 49 | #include <stdio.h> |
c75a6a9e | 50 | #include <signal.h> |
288f4aa9 | 51 | #include <stdlib.h> |
bb4bdbaf | 52 | #include "misc.hh" |
288f4aa9 BH |
53 | #include "mtasker.hh" |
54 | #include <utility> | |
288f4aa9 BH |
55 | #include "arguments.hh" |
56 | #include "syncres.hh" | |
88def049 BH |
57 | #include <fcntl.h> |
58 | #include <fstream> | |
3e61e7f7 | 59 | #include "sortlist.hh" |
5c633640 BH |
60 | #include "sstuff.hh" |
61 | #include <boost/tuple/tuple.hpp> | |
62 | #include <boost/tuple/tuple_comparison.hpp> | |
72df400f | 63 | #include <boost/shared_array.hpp> |
7f1fa77d | 64 | #include <boost/function.hpp> |
5605c067 | 65 | #include <boost/algorithm/string.hpp> |
8f7473d7 | 66 | #ifdef MALLOC_TRACE |
67 | #include "malloctrace.hh" | |
68 | #endif | |
40a3dd64 | 69 | #include <netinet/tcp.h> |
f12666f2 | 70 | #include "capabilities.hh" |
ea634573 BH |
71 | #include "dnsparser.hh" |
72 | #include "dnswriter.hh" | |
73 | #include "dnsrecords.hh" | |
f814d7c8 | 74 | #include "zoneparser-tng.hh" |
1d5b3ce6 | 75 | #include "rec_channel.hh" |
aaacf7f2 | 76 | #include "logger.hh" |
c8ddb7c2 | 77 | #include "iputils.hh" |
09e6702a | 78 | #include "mplexer.hh" |
c038218b | 79 | #include "config.h" |
808c5ef7 | 80 | #include "lua-recursor4.hh" |
ba1a571d | 81 | #include "version.hh" |
79332bff | 82 | #include "responsestats.hh" |
d67620e4 | 83 | #include "secpoll-recursor.hh" |
c5c066bf | 84 | #include "dnsname.hh" |
644dd1da | 85 | #include "filterpo.hh" |
86 | #include "rpzloader.hh" | |
b3f0ed10 | 87 | #include "validate-recursor.hh" |
f3c18728 | 88 | #include "rec-lua-conf.hh" |
5c3b5e7f | 89 | #include "ednsoptions.hh" |
85c7ca75 | 90 | #include "gettime.hh" |
d6f3fcfa | 91 | #include "pubsuffix.hh" |
af1377b7 NC |
92 | #ifdef NOD_ENABLED |
93 | #include "nod.hh" | |
94 | #endif /* NOD_ENABLED */ | |
f3c18728 | 95 | |
d9d3f9c1 | 96 | #include "rec-protobuf.hh" |
d705aad9 | 97 | #include "rec-snmp.hh" |
aa7929a3 | 98 | |
6b6720de PL |
99 | #ifdef HAVE_SYSTEMD |
100 | #include <systemd/sd-daemon.h> | |
101 | #endif | |
102 | ||
d187038c RG |
103 | #include "namespaces.hh" |
104 | ||
5cc8371b RG |
105 | #include "xpf.hh" |
106 | ||
d187038c RG |
107 | typedef map<ComboAddress, uint32_t, ComboAddress::addressOnlyLessThan> tcpClientCounts_t; |
108 | ||
f26bf547 | 109 | static thread_local std::shared_ptr<RecursorLua4> t_pdl; |
b243ca3b | 110 | static thread_local unsigned int t_id = 0; |
f26bf547 RG |
111 | static thread_local std::shared_ptr<Regex> t_traceRegex; |
112 | static thread_local std::unique_ptr<tcpClientCounts_t> t_tcpClientCounts; | |
63341e8d | 113 | #ifdef HAVE_PROTOBUF |
3fe06137 | 114 | static thread_local std::shared_ptr<std::vector<std::unique_ptr<RemoteLogger>>> t_protobufServers{nullptr}; |
b773359c | 115 | static thread_local uint64_t t_protobufServersGeneration; |
3fe06137 | 116 | static thread_local std::shared_ptr<std::vector<std::unique_ptr<RemoteLogger>>> t_outgoingProtobufServers{nullptr}; |
b773359c | 117 | static thread_local uint64_t t_outgoingProtobufServersGeneration; |
63341e8d | 118 | #endif /* HAVE_PROTOBUF */ |
f26bf547 RG |
119 | |
120 | thread_local std::unique_ptr<MT_t> MT; // the big MTasker | |
121 | thread_local std::unique_ptr<MemRecursorCache> t_RC; | |
122 | thread_local std::unique_ptr<RecursorPacketCache> t_packetCache; | |
3337c2f7 | 123 | thread_local FDMultiplexer* t_fdm{nullptr}; |
be9078b3 | 124 | thread_local std::unique_ptr<addrringbuf_t> t_remotes, t_servfailremotes, t_largeanswerremotes, t_bogusremotes; |
66f2e6ad | 125 | thread_local std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > > t_queryring, t_servfailqueryring, t_bogusqueryring; |
f26bf547 | 126 | thread_local std::shared_ptr<NetmaskGroup> t_allowFrom; |
aa7929a3 | 127 | #ifdef HAVE_PROTOBUF |
f26bf547 | 128 | thread_local std::unique_ptr<boost::uuids::random_generator> t_uuidGenerator; |
aa7929a3 | 129 | #endif |
af1377b7 NC |
130 | #ifdef NOD_ENABLED |
131 | thread_local std::shared_ptr<nod::NODDB> t_nodDBp; | |
41c542ec | 132 | thread_local std::shared_ptr<nod::UniqueResponseDB> t_udrDBp; |
af1377b7 | 133 | #endif /* NOD_ENABLED */ |
d187038c | 134 | __thread struct timeval g_now; // timestamp, updated (too) frequently |
d7dae798 | 135 | |
b243ca3b RG |
136 | typedef vector<pair<int, function< void(int, any&) > > > deferredAdd_t; |
137 | ||
d7dae798 | 138 | // for communicating with our threads |
b243ca3b RG |
139 | // effectively readonly after startup |
140 | struct RecThreadInfo | |
141 | { | |
142 | struct ThreadPipeSet | |
143 | { | |
144 | int writeToThread{-1}; | |
145 | int readToThread{-1}; | |
146 | int writeFromThread{-1}; | |
147 | int readFromThread{-1}; | |
148 | int writeQueriesToThread{-1}; // this one is non-blocking | |
149 | int readQueriesToThread{-1}; | |
150 | }; | |
151 | ||
adb6cd72 | 152 | /* FD corresponding to TCP sockets this thread is listening |
c47f201b | 153 | on. |
adb6cd72 RG |
154 | These FDs are also in deferredAdds when we have one |
155 | socket per listener, and in g_deferredAdds instead. */ | |
156 | std::set<int> tcpSockets; | |
b243ca3b RG |
157 | /* FD corresponding to listening sockets if we have one socket per |
158 | listener (with reuseport), otherwise all listeners share the | |
159 | same FD and g_deferredAdds is then used instead */ | |
160 | deferredAdd_t deferredAdds; | |
161 | struct ThreadPipeSet pipes; | |
162 | std::thread thread; | |
163 | /* handle the web server, carbon, statistics and the control channel */ | |
164 | bool isHandler{false}; | |
165 | /* accept incoming queries (and distributes them to the workers if pdns-distributes-queries is set) */ | |
166 | bool isListener{false}; | |
167 | /* process queries */ | |
168 | bool isWorker{false}; | |
49a699c4 | 169 | }; |
810ff705 | 170 | |
b243ca3b RG |
171 | /* first we have the handler thread, t_id == 0 (some other |
172 | helper threads like SNMP might have t_id == 0 as well) | |
173 | then the distributor threads if any | |
174 | and finally the workers */ | |
175 | static std::vector<RecThreadInfo> s_threadInfos; | |
176 | /* without reuseport, all listeners share the same sockets */ | |
177 | static deferredAdd_t g_deferredAdds; | |
faf580f5 | 178 | |
d187038c RG |
179 | typedef vector<int> tcpListenSockets_t; |
180 | typedef map<int, ComboAddress> listenSocketsAddresses_t; // is shared across all threads right now | |
3ea54bf0 | 181 | |
d187038c | 182 | static const ComboAddress g_local4("0.0.0.0"), g_local6("::"); |
d187038c | 183 | static listenSocketsAddresses_t g_listenSocketsAddresses; // is shared across all threads right now |
d187038c RG |
184 | static set<int> g_fromtosockets; // listen sockets that use 'sendfromto()' mechanism |
185 | static vector<ComboAddress> g_localQueryAddresses4, g_localQueryAddresses6; | |
186 | static AtomicCounter counter; | |
9065eb05 | 187 | static std::shared_ptr<SyncRes::domainmap_t> g_initialDomainMap; // new threads needs this to be setup |
f26bf547 | 188 | static std::shared_ptr<NetmaskGroup> g_initialAllowFrom; // new thread needs to be setup with this |
5cc8371b | 189 | static NetmaskGroup g_XPFAcl; |
d187038c | 190 | static size_t g_tcpMaxQueriesPerConn; |
a5886e6a | 191 | static size_t s_maxUDPQueriesPerRound; |
d187038c RG |
192 | static uint64_t g_latencyStatSize; |
193 | static uint32_t g_disthashseed; | |
194 | static unsigned int g_maxTCPPerClient; | |
d187038c | 195 | static unsigned int g_maxMThreads; |
b243ca3b | 196 | static unsigned int g_numDistributorThreads; |
d187038c RG |
197 | static unsigned int g_numWorkerThreads; |
198 | static int g_tcpTimeout; | |
199 | static uint16_t g_udpTruncationThreshold; | |
59cb4a79 | 200 | static uint16_t g_xpfRRCode{0}; |
d187038c RG |
201 | static std::atomic<bool> statsWanted; |
202 | static std::atomic<bool> g_quiet; | |
203 | static bool g_logCommonErrors; | |
204 | static bool g_anyToTcp; | |
b243ca3b | 205 | static bool g_weDistributeQueries; // if true, 1 or more threads listen on the incoming query sockets and distribute them to workers |
810ff705 | 206 | static bool g_reusePort{false}; |
00b8cadc | 207 | static bool g_gettagNeedsEDNSOptions{false}; |
0ec489bf | 208 | static time_t g_statisticsInterval; |
9065eb05 | 209 | static bool g_useIncomingECS; |
a6f7f5fe | 210 | std::atomic<uint32_t> g_maxCacheEntries, g_maxPacketCacheEntries; |
af1377b7 NC |
211 | #ifdef NOD_ENABLED |
212 | static bool g_nodEnabled; | |
213 | static DNSName g_nodLookupDomain; | |
214 | static bool g_nodLog; | |
215 | static SuffixMatchNode g_nodDomainWL; | |
ca2526f5 | 216 | static std::string g_nod_pbtag; |
41c542ec NC |
217 | static bool g_udrEnabled; |
218 | static bool g_udrLog; | |
ca2526f5 | 219 | static std::string g_udr_pbtag; |
af1377b7 | 220 | #endif /* NOD_ENABLED */ |
f097141b | 221 | #ifdef HAVE_BOOST_CONTAINER_FLAT_SET_HPP |
bf6f28ca | 222 | static boost::container::flat_set<uint16_t> s_avoidUdpSourcePorts; |
f097141b CHB |
223 | #else |
224 | static std::set<uint16_t> s_avoidUdpSourcePorts; | |
225 | #endif | |
bf6f28ca CHB |
226 | static uint16_t s_minUdpSourcePort; |
227 | static uint16_t s_maxUdpSourcePort; | |
49a699c4 | 228 | |
b243ca3b | 229 | RecursorControlChannel s_rcc; // only active in the handler thread |
d187038c | 230 | RecursorStats g_stats; |
2d733c0f | 231 | string s_programname="pdns_recursor"; |
d187038c | 232 | string s_pidfname; |
c1c29961 | 233 | bool g_lowercaseOutgoing; |
bf19ccfd | 234 | unsigned int g_networkTimeoutMsec; |
d187038c RG |
235 | unsigned int g_numThreads; |
236 | uint16_t g_outgoingEDNSBufsize; | |
98d36505 | 237 | bool g_logRPZChanges{false}; |
c3828c03 | 238 | |
12cd44ee | 239 | #define LOCAL_NETS "127.0.0.0/8, 10.0.0.0/8, 100.64.0.0/10, 169.254.0.0/16, 192.168.0.0/16, 172.16.0.0/12, ::1/128, fc00::/7, fe80::/10" |
2fe3354d | 240 | #define LOCAL_NETS_INVERSE "!127.0.0.0/8, !10.0.0.0/8, !100.64.0.0/10, !169.254.0.0/16, !192.168.0.0/16, !172.16.0.0/12, !::1/128, !fc00::/7, !fe80::/10" |
12cd44ee | 241 | // Bad Nets taken from both: |
3ddb9247 | 242 | // http://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml |
12cd44ee | 243 | // and |
244 | // http://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml | |
245 | // where such a network may not be considered a valid destination | |
246 | #define BAD_NETS "0.0.0.0/8, 192.0.0.0/24, 192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24, 240.0.0.0/4, ::/96, ::ffff:0:0/96, 100::/64, 2001:db8::/32" | |
247 | #define DONT_QUERY LOCAL_NETS ", " BAD_NETS | |
49a699c4 | 248 | |
d7dae798 | 249 | //! used to send information to a newborn mthread |
ea634573 | 250 | struct DNSComboWriter { |
08b02366 | 251 | DNSComboWriter(const std::string& query, const struct timeval& now): d_mdp(true, query), d_now(now), d_query(query) |
2749c3fe RG |
252 | { |
253 | } | |
5cc8371b | 254 | |
08b02366 | 255 | DNSComboWriter(const std::string& query, const struct timeval& now, std::vector<std::string>&& policyTags, LuaContext::LuaObject&& data): d_mdp(true, query), d_now(now), d_query(query), d_policyTags(std::move(policyTags)), d_data(std::move(data)) |
5164bac3 RG |
256 | { |
257 | } | |
258 | ||
5cc8371b RG |
259 | void setRemote(const ComboAddress& sa) |
260 | { | |
261 | d_remote=sa; | |
262 | } | |
263 | ||
264 | void setSource(const ComboAddress& sa) | |
ea634573 | 265 | { |
5cc8371b | 266 | d_source=sa; |
ea634573 BH |
267 | } |
268 | ||
b71b60ee | 269 | void setLocal(const ComboAddress& sa) |
270 | { | |
271 | d_local=sa; | |
272 | } | |
273 | ||
5cc8371b RG |
274 | void setDestination(const ComboAddress& sa) |
275 | { | |
276 | d_destination=sa; | |
277 | } | |
b71b60ee | 278 | |
ea634573 BH |
279 | void setSocket(int sock) |
280 | { | |
281 | d_socket=sock; | |
282 | } | |
a1754c6a BH |
283 | |
284 | string getRemote() const | |
285 | { | |
5cc8371b RG |
286 | if (d_source == d_remote) { |
287 | return d_source.toStringWithPort(); | |
288 | } | |
289 | return d_source.toStringWithPort() + " (proxied by " + d_remote.toStringWithPort() + ")"; | |
a1754c6a BH |
290 | } |
291 | ||
5cc8371b | 292 | MOADNSParser d_mdp; |
c9e9e5e0 | 293 | struct timeval d_now; |
5cc8371b RG |
294 | /* Remote client, might differ from d_source |
295 | in case of XPF, in which case d_source holds | |
296 | the IP of the client and d_remote of the proxy | |
297 | */ | |
298 | ComboAddress d_remote; | |
299 | ComboAddress d_source; | |
300 | /* Destination address, might differ from | |
301 | d_destination in case of XPF, in which case | |
302 | d_destination holds the IP of the proxy and | |
303 | d_local holds our own. */ | |
304 | ComboAddress d_local; | |
305 | ComboAddress d_destination; | |
aa7929a3 RG |
306 | #ifdef HAVE_PROTOBUF |
307 | boost::uuids::uuid d_uuid; | |
67e31ebe | 308 | string d_requestorId; |
590388d2 | 309 | string d_deviceId; |
aa7929a3 | 310 | #endif |
08b02366 | 311 | std::string d_query; |
5164bac3 RG |
312 | std::vector<std::string> d_policyTags; |
313 | LuaContext::LuaObject d_data; | |
b40562da | 314 | EDNSSubnetOpts d_ednssubnet; |
5164bac3 | 315 | shared_ptr<TCPConnection> d_tcpConnection; |
ea634573 | 316 | int d_socket; |
b673817a | 317 | unsigned int d_tag{0}; |
e9f63d47 | 318 | uint32_t d_qhash{0}; |
70fb28d9 | 319 | uint32_t d_ttlCap{std::numeric_limits<uint32_t>::max()}; |
08b02366 RG |
320 | uint16_t d_ecsBegin{0}; |
321 | uint16_t d_ecsEnd{0}; | |
70fb28d9 | 322 | bool d_variable{false}; |
5164bac3 RG |
323 | bool d_ecsFound{false}; |
324 | bool d_ecsParsed{false}; | |
325 | bool d_tcp; | |
ea634573 BH |
326 | }; |
327 | ||
06857845 RG |
328 | MT_t* getMT() |
329 | { | |
330 | return MT ? MT.get() : nullptr; | |
331 | } | |
ea634573 | 332 | |
288f4aa9 BH |
333 | ArgvMap &arg() |
334 | { | |
335 | static ArgvMap theArg; | |
336 | return theArg; | |
337 | } | |
4ef015cd | 338 | |
8fb594ba | 339 | unsigned int getRecursorThreadId() |
b4015453 | 340 | { |
30da2030 | 341 | return t_id; |
b4015453 | 342 | } |
09e6702a | 343 | |
30ee601a RG |
344 | int getMTaskerTID() |
345 | { | |
346 | return MT->getTid(); | |
347 | } | |
348 | ||
b243ca3b RG |
349 | static bool isDistributorThread() |
350 | { | |
351 | if (t_id == 0) { | |
352 | return false; | |
353 | } | |
354 | ||
355 | return g_weDistributeQueries && s_threadInfos.at(t_id).isListener; | |
356 | } | |
357 | ||
358 | static bool isHandlerThread() | |
359 | { | |
360 | if (t_id == 0) { | |
361 | return true; | |
362 | } | |
363 | ||
364 | return s_threadInfos.at(t_id).isHandler; | |
365 | } | |
366 | ||
d187038c | 367 | static void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 368 | |
50c81227 | 369 | // -1 is error, 0 is timeout, 1 is success |
3ddb9247 | 370 | int asendtcp(const string& data, Socket* sock) |
5c633640 BH |
371 | { |
372 | PacketID pident; | |
373 | pident.sock=sock; | |
374 | pident.outMSG=data; | |
3ddb9247 | 375 | |
bb4bdbaf | 376 | t_fdm->addWriteFD(sock->getHandle(), handleTCPClientWritable, pident); |
50c81227 | 377 | string packet; |
5c633640 | 378 | |
5b0ddd18 | 379 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec); |
23db0a09 | 380 | |
9170fbaf | 381 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 382 | t_fdm->removeWriteFD(sock->getHandle()); |
5c633640 | 383 | } |
50c81227 BH |
384 | else if(packet.size() !=data.size()) { // main loop tells us what it sent out, or empty in case of an error |
385 | return -1; | |
386 | } | |
9170fbaf | 387 | return ret; |
5c633640 BH |
388 | } |
389 | ||
d187038c | 390 | static void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var); |
09e6702a | 391 | |
9170fbaf | 392 | // -1 is error, 0 is timeout, 1 is success |
a683e8bd | 393 | int arecvtcp(string& data, size_t len, Socket* sock, bool incompleteOkay) |
288f4aa9 | 394 | { |
50c81227 | 395 | data.clear(); |
5c633640 BH |
396 | PacketID pident; |
397 | pident.sock=sock; | |
398 | pident.inNeeded=len; | |
825fa717 | 399 | pident.inIncompleteOkay=incompleteOkay; |
bb4bdbaf | 400 | t_fdm->addReadFD(sock->getHandle(), handleTCPClientReadable, pident); |
5c633640 | 401 | |
bb4bdbaf | 402 | int ret=MT->waitEvent(pident,&data, g_networkTimeoutMsec); |
9170fbaf | 403 | if(!ret || ret==-1) { // timeout |
bb4bdbaf | 404 | t_fdm->removeReadFD(sock->getHandle()); |
288f4aa9 | 405 | } |
50c81227 BH |
406 | else if(data.empty()) {// error, EOF or other |
407 | return -1; | |
408 | } | |
409 | ||
9170fbaf | 410 | return ret; |
288f4aa9 BH |
411 | } |
412 | ||
d187038c | 413 | static void handleGenUDPQueryResponse(int fd, FDMultiplexer::funcparam_t& var) |
4465e941 | 414 | { |
fba1e944 | 415 | PacketID pident=*any_cast<PacketID>(&var); |
4465e941 | 416 | char resp[512]; |
7c77ce63 RG |
417 | ComboAddress fromaddr; |
418 | socklen_t addrlen=sizeof(fromaddr); | |
419 | ||
420 | ssize_t ret=recvfrom(fd, resp, sizeof(resp), 0, (sockaddr *)&fromaddr, &addrlen); | |
421 | if (fromaddr != pident.remote) { | |
e6a9dde5 | 422 | g_log<<Logger::Notice<<"Response received from the wrong remote host ("<<fromaddr.toStringWithPort()<<" instead of "<<pident.remote.toStringWithPort()<<"), discarding"<<endl; |
7c77ce63 RG |
423 | |
424 | } | |
425 | ||
4465e941 | 426 | t_fdm->removeReadFD(fd); |
427 | if(ret >= 0) { | |
a683e8bd | 428 | string data(resp, (size_t) ret); |
fba1e944 | 429 | MT->sendEvent(pident, &data); |
4465e941 | 430 | } |
431 | else { | |
fba1e944 | 432 | string empty; |
433 | MT->sendEvent(pident, &empty); | |
434 | // cerr<<"Had some kind of error: "<<ret<<", "<<strerror(errno)<<endl; | |
4465e941 | 435 | } |
436 | } | |
fba1e944 | 437 | string GenUDPQueryResponse(const ComboAddress& dest, const string& query) |
4465e941 | 438 | { |
4465e941 | 439 | Socket s(dest.sin4.sin_family, SOCK_DGRAM); |
440 | s.setNonBlocking(); | |
441 | ComboAddress local = getQueryLocalAddress(dest.sin4.sin_family, 0); | |
442 | ||
443 | s.bind(local); | |
444 | s.connect(dest); | |
4465e941 | 445 | s.send(query); |
446 | ||
447 | PacketID pident; | |
448 | pident.sock=&s; | |
7c77ce63 | 449 | pident.remote=dest; |
4465e941 | 450 | pident.type=0; |
fba1e944 | 451 | t_fdm->addReadFD(s.getHandle(), handleGenUDPQueryResponse, pident); |
4465e941 | 452 | |
453 | string data; | |
fba1e944 | 454 | |
4465e941 | 455 | int ret=MT->waitEvent(pident,&data, g_networkTimeoutMsec); |
fba1e944 | 456 | |
4465e941 | 457 | if(!ret || ret==-1) { // timeout |
4465e941 | 458 | t_fdm->removeReadFD(s.getHandle()); |
459 | } | |
460 | else if(data.empty()) {// error, EOF or other | |
fba1e944 | 461 | // we could special case this |
4465e941 | 462 | return data; |
463 | } | |
4465e941 | 464 | return data; |
465 | } | |
466 | ||
d7dae798 | 467 | //! pick a random query local address |
1652a63e | 468 | ComboAddress getQueryLocalAddress(int family, uint16_t port) |
5a38281c | 469 | { |
1652a63e | 470 | ComboAddress ret; |
5a38281c | 471 | if(family==AF_INET) { |
3ddb9247 | 472 | if(g_localQueryAddresses4.empty()) |
1652a63e | 473 | ret = g_local4; |
3ddb9247 | 474 | else |
1652a63e BH |
475 | ret = g_localQueryAddresses4[dns_random(g_localQueryAddresses4.size())]; |
476 | ret.sin4.sin_port = htons(port); | |
5a38281c BH |
477 | } |
478 | else { | |
479 | if(g_localQueryAddresses6.empty()) | |
1652a63e BH |
480 | ret = g_local6; |
481 | else | |
482 | ret = g_localQueryAddresses6[dns_random(g_localQueryAddresses6.size())]; | |
3ddb9247 | 483 | |
1652a63e | 484 | ret.sin6.sin6_port = htons(port); |
5a38281c | 485 | } |
1652a63e | 486 | return ret; |
5a38281c | 487 | } |
4ef015cd | 488 | |
d187038c | 489 | static void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t&); |
09e6702a | 490 | |
d187038c | 491 | static void setSocketBuffer(int fd, int optname, uint32_t size) |
d7dae798 BH |
492 | { |
493 | uint32_t psize=0; | |
494 | socklen_t len=sizeof(psize); | |
3ddb9247 | 495 | |
d7dae798 | 496 | if(!getsockopt(fd, SOL_SOCKET, optname, (char*)&psize, &len) && psize > size) { |
e6a9dde5 | 497 | g_log<<Logger::Error<<"Not decreasing socket buffer size from "<<psize<<" to "<<size<<endl; |
3ddb9247 | 498 | return; |
d7dae798 BH |
499 | } |
500 | ||
501 | if (setsockopt(fd, SOL_SOCKET, optname, (char*)&size, sizeof(size)) < 0 ) | |
e6a9dde5 | 502 | g_log<<Logger::Error<<"Unable to raise socket buffer size to "<<size<<": "<<strerror(errno)<<endl; |
d7dae798 BH |
503 | } |
504 | ||
505 | ||
506 | static void setSocketReceiveBuffer(int fd, uint32_t size) | |
507 | { | |
508 | setSocketBuffer(fd, SO_RCVBUF, size); | |
509 | } | |
510 | ||
511 | static void setSocketSendBuffer(int fd, uint32_t size) | |
512 | { | |
513 | setSocketBuffer(fd, SO_SNDBUF, size); | |
514 | } | |
515 | ||
516 | ||
4ef015cd BH |
517 | // you can ask this class for a UDP socket to send a query from |
518 | // this socket is not yours, don't even think about deleting it | |
519 | // but after you call 'returnSocket' on it, don't assume anything anymore | |
520 | class UDPClientSocks | |
521 | { | |
4ef015cd | 522 | unsigned int d_numsocks; |
4ef015cd | 523 | public: |
e2642526 | 524 | UDPClientSocks() : d_numsocks(0) |
4ef015cd BH |
525 | { |
526 | } | |
527 | ||
996c89cc | 528 | typedef set<int> socks_t; |
4ef015cd BH |
529 | socks_t d_socks; |
530 | ||
2ee280cf | 531 | // returning -2 means: temporary OS error (ie, out of files), -1 means error related to remote |
d8f6d49f | 532 | int getSocket(const ComboAddress& toaddr, int* fd) |
4ef015cd | 533 | { |
d8f6d49f BH |
534 | *fd=makeClientSocket(toaddr.sin4.sin_family); |
535 | if(*fd < 0) // temporary error - receive exception otherwise | |
2ee280cf | 536 | return -2; |
d8f6d49f BH |
537 | |
538 | if(connect(*fd, (struct sockaddr*)(&toaddr), toaddr.getSocklen()) < 0) { | |
539 | int err = errno; | |
41ff43f8 | 540 | // returnSocket(*fd); |
a7b68ae7 RG |
541 | try { |
542 | closesocket(*fd); | |
543 | } | |
544 | catch(const PDNSException& e) { | |
e6a9dde5 | 545 | g_log<<Logger::Error<<"Error closing UDP socket after connect() failed: "<<e.reason<<endl; |
a7b68ae7 RG |
546 | } |
547 | ||
d8f6d49f | 548 | if(err==ENETUNREACH) // Seth "My Interfaces Are Like A Yo Yo" Arnold special |
4957a608 | 549 | return -2; |
998a4334 | 550 | return -1; |
d8f6d49f | 551 | } |
998a4334 | 552 | |
d8f6d49f | 553 | d_socks.insert(*fd); |
998a4334 | 554 | d_numsocks++; |
d8f6d49f | 555 | return 0; |
4ef015cd BH |
556 | } |
557 | ||
095c3045 BH |
558 | void returnSocket(int fd) |
559 | { | |
560 | socks_t::iterator i=d_socks.find(fd); | |
34801ab1 | 561 | if(i==d_socks.end()) { |
335da0ba | 562 | throw PDNSException("Trying to return a socket (fd="+std::to_string(fd)+") not in the pool"); |
34801ab1 | 563 | } |
bb4bdbaf | 564 | returnSocketLocked(i); |
095c3045 BH |
565 | } |
566 | ||
4ef015cd | 567 | // return a socket to the pool, or simply erase it |
bb4bdbaf | 568 | void returnSocketLocked(socks_t::iterator& i) |
4ef015cd | 569 | { |
600fc20b | 570 | if(i==d_socks.end()) { |
3f81d239 | 571 | throw PDNSException("Trying to return a socket not in the pool"); |
600fc20b | 572 | } |
80baf329 | 573 | try { |
bb4bdbaf | 574 | t_fdm->removeReadFD(*i); |
80baf329 BH |
575 | } |
576 | catch(FDMultiplexerException& e) { | |
bb4bdbaf | 577 | // we sometimes return a socket that has not yet been assigned to t_fdm |
80baf329 | 578 | } |
a7b68ae7 RG |
579 | try { |
580 | closesocket(*i); | |
581 | } | |
582 | catch(const PDNSException& e) { | |
e6a9dde5 | 583 | g_log<<Logger::Error<<"Error closing returned UDP socket: "<<e.reason<<endl; |
a7b68ae7 | 584 | } |
3ddb9247 | 585 | |
998a4334 BH |
586 | d_socks.erase(i++); |
587 | --d_numsocks; | |
4ef015cd | 588 | } |
d8f6d49f BH |
589 | |
590 | // returns -1 for errors which might go away, throws for ones that won't | |
bb4bdbaf | 591 | static int makeClientSocket(int family) |
d8f6d49f | 592 | { |
a683e8bd | 593 | int ret=socket(family, SOCK_DGRAM, 0 ); // turns out that setting CLO_EXEC and NONBLOCK from here is not a performance win on Linux (oddly enough) |
42c235e5 | 594 | |
d8f6d49f BH |
595 | if(ret < 0 && errno==EMFILE) // this is not a catastrophic error |
596 | return ret; | |
3ddb9247 PD |
597 | |
598 | if(ret<0) | |
335da0ba | 599 | throw PDNSException("Making a socket for resolver (family = "+std::to_string(family)+"): "+stringerror()); |
36855b53 | 600 | |
7eb73ffa | 601 | // setCloseOnExec(ret); // we're not going to exec |
5a38281c | 602 | |
d8f6d49f | 603 | int tries=10; |
3aa91c3e | 604 | ComboAddress sin; |
d8f6d49f | 605 | while(--tries) { |
1652a63e | 606 | uint16_t port; |
3ddb9247 | 607 | |
d8f6d49f | 608 | if(tries==1) // fall back to kernel 'random' |
4957a608 | 609 | port = 0; |
bf6f28ca CHB |
610 | else { |
611 | do { | |
612 | port = s_minUdpSourcePort + dns_random(s_maxUdpSourcePort - s_minUdpSourcePort + 1); | |
613 | } | |
614 | while (s_avoidUdpSourcePorts.count(port)); | |
615 | } | |
5a38281c | 616 | |
3aa91c3e | 617 | sin=getQueryLocalAddress(family, port); // does htons for us |
5a38281c | 618 | |
3ddb9247 | 619 | if (::bind(ret, (struct sockaddr *)&sin, sin.getSocklen()) >= 0) |
4957a608 | 620 | break; |
d8f6d49f BH |
621 | } |
622 | if(!tries) | |
3aa91c3e | 623 | throw PDNSException("Resolver binding to local query client socket on "+sin.toString()+": "+stringerror()); |
3ddb9247 | 624 | |
3897b9e1 | 625 | setNonBlocking(ret); |
d8f6d49f BH |
626 | return ret; |
627 | } | |
49a699c4 BH |
628 | }; |
629 | ||
f26bf547 | 630 | static thread_local std::unique_ptr<UDPClientSocks> t_udpclientsocks; |
4ef015cd | 631 | |
288f4aa9 | 632 | /* these two functions are used by LWRes */ |
34801ab1 | 633 | // -2 is OS error, -1 is error that depends on the remote, > 0 is success |
a683e8bd | 634 | int asendto(const char *data, size_t len, int flags, |
3ddb9247 | 635 | const ComboAddress& toaddr, uint16_t id, const DNSName& domain, uint16_t qtype, int* fd) |
288f4aa9 | 636 | { |
34801ab1 BH |
637 | |
638 | PacketID pident; | |
787e5eab BH |
639 | pident.domain = domain; |
640 | pident.remote = toaddr; | |
641 | pident.type = qtype; | |
34801ab1 BH |
642 | |
643 | // see if there is an existing outstanding request we can chain on to, using partial equivalence function | |
644 | pair<MT_t::waiters_t::iterator, MT_t::waiters_t::iterator> chain=MT->d_waiters.equal_range(pident, PacketIDBirthdayCompare()); | |
645 | ||
646 | for(; chain.first != chain.second; chain.first++) { | |
647 | if(chain.first->key.fd > -1) { // don't chain onto existing chained waiter! | |
e27e91a8 | 648 | /* |
4665c31e BH |
649 | cerr<<"Orig: "<<pident.domain<<", "<<pident.remote.toString()<<", id="<<id<<endl; |
650 | cerr<<"Had hit: "<< chain.first->key.domain<<", "<<chain.first->key.remote.toString()<<", id="<<chain.first->key.id | |
4957a608 | 651 | <<", count="<<chain.first->key.chain.size()<<", origfd: "<<chain.first->key.fd<<endl; |
e27e91a8 | 652 | */ |
34801ab1 BH |
653 | chain.first->key.chain.insert(id); // we can chain |
654 | *fd=-1; // gets used in waitEvent / sendEvent later on | |
655 | return 1; | |
656 | } | |
657 | } | |
658 | ||
49a699c4 | 659 | int ret=t_udpclientsocks->getSocket(toaddr, fd); |
d8f6d49f BH |
660 | if(ret < 0) |
661 | return ret; | |
34801ab1 | 662 | |
998a4334 BH |
663 | pident.fd=*fd; |
664 | pident.id=id; | |
3ddb9247 | 665 | |
bb4bdbaf BH |
666 | t_fdm->addReadFD(*fd, handleUDPServerResponse, pident); |
667 | ret = send(*fd, data, len, 0); | |
668 | ||
5b0ddd18 | 669 | int tmp = errno; |
bb4bdbaf | 670 | |
7302ed0a | 671 | if(ret < 0) |
49a699c4 | 672 | t_udpclientsocks->returnSocket(*fd); |
bb4bdbaf | 673 | |
5b0ddd18 | 674 | errno = tmp; // this is for logging purposes only |
7302ed0a | 675 | return ret; |
288f4aa9 BH |
676 | } |
677 | ||
9170fbaf | 678 | // -1 is error, 0 is timeout, 1 is success |
f128d20d | 679 | int arecvfrom(std::string& packet, int flags, const ComboAddress& fromaddr, size_t *d_len, |
c5c066bf | 680 | uint16_t id, const DNSName& domain, uint16_t qtype, int fd, struct timeval* now) |
288f4aa9 | 681 | { |
0d5f0a9f | 682 | static optional<unsigned int> nearMissLimit; |
3ddb9247 | 683 | if(!nearMissLimit) |
0d5f0a9f BH |
684 | nearMissLimit=::arg().asNum("spoof-nearmiss-max"); |
685 | ||
288f4aa9 | 686 | PacketID pident; |
4ef015cd | 687 | pident.fd=fd; |
288f4aa9 | 688 | pident.id=id; |
0d5f0a9f | 689 | pident.domain=domain; |
787e5eab | 690 | pident.type = qtype; |
996c89cc | 691 | pident.remote=fromaddr; |
b636533b | 692 | |
5b0ddd18 | 693 | int ret=MT->waitEvent(pident, &packet, g_networkTimeoutMsec, now); |
34801ab1 | 694 | |
9170fbaf | 695 | if(ret > 0) { |
996c89cc | 696 | if(packet.empty()) // means "error" |
3ddb9247 | 697 | return -1; |
998a4334 | 698 | |
a683e8bd | 699 | *d_len=packet.size(); |
f128d20d | 700 | |
0d5f0a9f | 701 | if(*nearMissLimit && pident.nearMisses > *nearMissLimit) { |
e6a9dde5 | 702 | g_log<<Logger::Error<<"Too many ("<<pident.nearMisses<<" > "<<*nearMissLimit<<") bogus answers for '"<<domain<<"' from "<<fromaddr.toString()<<", assuming spoof attempt."<<endl; |
0d5f0a9f | 703 | g_stats.spoofCount++; |
35ce8576 BH |
704 | return -1; |
705 | } | |
288f4aa9 | 706 | } |
09e6702a | 707 | else { |
34801ab1 | 708 | if(fd >= 0) |
49a699c4 | 709 | t_udpclientsocks->returnSocket(fd); |
09e6702a | 710 | } |
9170fbaf | 711 | return ret; |
288f4aa9 BH |
712 | } |
713 | ||
88def049 BH |
714 | static void writePid(void) |
715 | { | |
191f2e47 | 716 | if(!::arg().mustDo("write-pid")) |
717 | return; | |
18e7758c | 718 | ofstream of(s_pidfname.c_str(), std::ios_base::app); |
88def049 | 719 | if(of) |
705f31ae | 720 | of<< Utility::getpid() <<endl; |
88def049 | 721 | else |
e6a9dde5 | 722 | g_log<<Logger::Error<<"Writing pid for "<<Utility::getpid()<<" to "<<s_pidfname<<" failed: "<<strerror(errno)<<endl; |
88def049 BH |
723 | } |
724 | ||
2749c3fe | 725 | TCPConnection::TCPConnection(int fd, const ComboAddress& addr) : data(2, 0), d_remote(addr), d_fd(fd) |
3ddb9247 PD |
726 | { |
727 | ++s_currentConnections; | |
cd989c87 | 728 | (*t_tcpClientCounts)[d_remote]++; |
0e408828 | 729 | } |
cd989c87 BH |
730 | |
731 | TCPConnection::~TCPConnection() | |
0e408828 | 732 | { |
a7b68ae7 RG |
733 | try { |
734 | if(closesocket(d_fd) < 0) | |
e6a9dde5 | 735 | g_log<<Logger::Error<<"Error closing socket for TCPConnection"<<endl; |
a7b68ae7 RG |
736 | } |
737 | catch(const PDNSException& e) { | |
e6a9dde5 | 738 | g_log<<Logger::Error<<"Error closing TCPConnection socket: "<<e.reason<<endl; |
a7b68ae7 RG |
739 | } |
740 | ||
3ddb9247 | 741 | if(t_tcpClientCounts->count(d_remote) && !(*t_tcpClientCounts)[d_remote]--) |
cd989c87 | 742 | t_tcpClientCounts->erase(d_remote); |
1bc9e6bd | 743 | --s_currentConnections; |
0e408828 | 744 | } |
0e9d9ce2 | 745 | |
3ddb9247 | 746 | AtomicCounter TCPConnection::s_currentConnections; |
d187038c RG |
747 | |
748 | static void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var); | |
6dcd28c3 | 749 | |
92011b8f | 750 | // the idea is, only do things that depend on the *response* here. Incoming accounting is on incoming. |
d187038c | 751 | static void updateResponseStats(int res, const ComboAddress& remote, unsigned int packetsize, const DNSName* query, uint16_t qtype) |
2cc13433 | 752 | { |
92011b8f | 753 | if(packetsize > 1000 && t_largeanswerremotes) |
754 | t_largeanswerremotes->push_back(remote); | |
2cc13433 BH |
755 | switch(res) { |
756 | case RCode::ServFail: | |
92011b8f | 757 | if(t_servfailremotes) { |
758 | t_servfailremotes->push_back(remote); | |
5af86fdc | 759 | if(query && t_servfailqueryring) // packet cache |
92011b8f | 760 | t_servfailqueryring->push_back(make_pair(*query, qtype)); |
761 | } | |
2cc13433 BH |
762 | g_stats.servFails++; |
763 | break; | |
764 | case RCode::NXDomain: | |
765 | g_stats.nxDomains++; | |
766 | break; | |
767 | case RCode::NoError: | |
768 | g_stats.noErrors++; | |
769 | break; | |
770 | } | |
771 | } | |
772 | ||
9a864da4 | 773 | static string makeLoginfo(const std::unique_ptr<DNSComboWriter>& dc) |
a903b39c | 774 | try |
775 | { | |
5cc8371b | 776 | return "("+dc->d_mdp.d_qname.toLogString()+"/"+DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)+" from "+(dc->getRemote())+")"; |
a903b39c | 777 | } |
778 | catch(...) | |
779 | { | |
780 | return "Exception making error message for exception"; | |
781 | } | |
782 | ||
aa7929a3 | 783 | #ifdef HAVE_PROTOBUF |
b773359c | 784 | static void protobufLogQuery(uint8_t maskV4, uint8_t maskV6, const boost::uuids::uuid& uniqueId, const ComboAddress& remote, const ComboAddress& local, const Netmask& ednssubnet, bool tcp, uint16_t id, size_t len, const DNSName& qname, uint16_t qtype, uint16_t qclass, const std::vector<std::string>& policyTags, const std::string& requestorId, const std::string& deviceId) |
aa7929a3 | 785 | { |
b773359c RG |
786 | if (!t_protobufServers) { |
787 | return; | |
788 | } | |
789 | ||
e1c8a4bb RG |
790 | Netmask requestorNM(remote, remote.sin4.sin_family == AF_INET ? maskV4 : maskV6); |
791 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); | |
792 | RecProtoBufMessage message(DNSProtoBufMessage::Query, uniqueId, &requestor, &local, qname, qtype, qclass, id, tcp, len); | |
c165308b | 793 | message.setServerIdentity(SyncRes::s_serverID); |
a94bc5d7 | 794 | message.setEDNSSubnet(ednssubnet, ednssubnet.isIpv4() ? maskV4 : maskV6); |
67e31ebe | 795 | message.setRequestorId(requestorId); |
590388d2 | 796 | message.setDeviceId(deviceId); |
02b47f43 | 797 | |
02b47f43 | 798 | if (!policyTags.empty()) { |
d9d3f9c1 | 799 | message.setPolicyTags(policyTags); |
02b47f43 | 800 | } |
aa7929a3 | 801 | |
d9d3f9c1 | 802 | // cerr <<message.toDebugString()<<endl; |
aa7929a3 | 803 | std::string str; |
d9d3f9c1 | 804 | message.serialize(str); |
b773359c RG |
805 | |
806 | for (auto& server : *t_protobufServers) { | |
807 | server->queueData(str); | |
808 | } | |
aa7929a3 RG |
809 | } |
810 | ||
b773359c | 811 | static void protobufLogResponse(const RecProtoBufMessage& message) |
aa7929a3 | 812 | { |
b773359c RG |
813 | if (!t_protobufServers) { |
814 | return; | |
815 | } | |
816 | ||
d9d3f9c1 | 817 | // cerr <<message.toDebugString()<<endl; |
aa7929a3 | 818 | std::string str; |
d9d3f9c1 | 819 | message.serialize(str); |
b773359c RG |
820 | |
821 | for (auto& server : *t_protobufServers) { | |
822 | server->queueData(str); | |
823 | } | |
aa7929a3 RG |
824 | } |
825 | #endif | |
826 | ||
53508135 PL |
827 | /** |
828 | * Chases the CNAME provided by the PolicyCustom RPZ policy. | |
829 | * | |
830 | * @param spoofed: The DNSRecord that was created by the policy, should already be added to ret | |
831 | * @param qtype: The QType of the original query | |
832 | * @param sr: A SyncRes | |
833 | * @param res: An integer that will contain the RCODE of the lookup we do | |
834 | * @param ret: A vector of DNSRecords where the result of the CNAME chase should be appended to | |
835 | */ | |
d187038c | 836 | static void handleRPZCustom(const DNSRecord& spoofed, const QType& qtype, SyncRes& sr, int& res, vector<DNSRecord>& ret) |
53508135 PL |
837 | { |
838 | if (spoofed.d_type == QType::CNAME) { | |
30ee601a RG |
839 | bool oldWantsRPZ = sr.getWantsRPZ(); |
840 | sr.setWantsRPZ(false); | |
53508135 PL |
841 | vector<DNSRecord> ans; |
842 | res = sr.beginResolve(DNSName(spoofed.d_content->getZoneRepresentation()), qtype, 1, ans); | |
843 | for (const auto& rec : ans) { | |
844 | if(rec.d_place == DNSResourceRecord::ANSWER) { | |
845 | ret.push_back(rec); | |
846 | } | |
847 | } | |
848 | // Reset the RPZ state of the SyncRes | |
30ee601a | 849 | sr.setWantsRPZ(oldWantsRPZ); |
53508135 PL |
850 | } |
851 | } | |
852 | ||
70fb28d9 | 853 | static bool addRecordToPacket(DNSPacketWriter& pw, const DNSRecord& rec, uint32_t& minTTL, uint32_t ttlCap, const uint16_t maxAnswerSize) |
97c6d7e5 | 854 | { |
70fb28d9 | 855 | pw.startRecord(rec.d_name, rec.d_type, (rec.d_ttl > ttlCap ? ttlCap : rec.d_ttl), rec.d_class, rec.d_place); |
97c6d7e5 RG |
856 | |
857 | if(rec.d_type != QType::OPT) // their TTL ain't real | |
858 | minTTL = min(minTTL, rec.d_ttl); | |
859 | ||
860 | rec.d_content->toPacket(pw); | |
861 | if(pw.size() > static_cast<size_t>(maxAnswerSize)) { | |
862 | pw.rollback(); | |
863 | if(rec.d_place != DNSResourceRecord::ADDITIONAL) { | |
864 | pw.getHeader()->tc=1; | |
865 | pw.truncate(); | |
866 | } | |
867 | return false; | |
868 | } | |
869 | ||
870 | return true; | |
871 | } | |
872 | ||
63341e8d | 873 | #ifdef HAVE_PROTOBUF |
3fe06137 | 874 | static std::shared_ptr<std::vector<std::unique_ptr<RemoteLogger>>> startProtobufServers(const ProtobufExportConfig& config) |
63341e8d | 875 | { |
3fe06137 | 876 | auto result = std::make_shared<std::vector<std::unique_ptr<RemoteLogger>>>(); |
b773359c RG |
877 | |
878 | for (const auto& server : config.servers) { | |
879 | try { | |
3fe06137 | 880 | result->emplace_back(new RemoteLogger(server, config.timeout, config.maxQueuedEntries, config.reconnectWaitTime, config.asyncConnect)); |
b773359c RG |
881 | } |
882 | catch(const std::exception& e) { | |
883 | g_log<<Logger::Error<<"Error while starting protobuf logger to '"<<server<<": "<<e.what()<<endl; | |
884 | } | |
885 | catch(const PDNSException& e) { | |
886 | g_log<<Logger::Error<<"Error while starting protobuf logger to '"<<server<<": "<<e.reason<<endl; | |
887 | } | |
63341e8d RG |
888 | } |
889 | ||
890 | return result; | |
891 | } | |
892 | ||
893 | static bool checkProtobufExport(LocalStateHolder<LuaConfigItems>& luaconfsLocal) | |
894 | { | |
895 | if (!luaconfsLocal->protobufExportConfig.enabled) { | |
b773359c RG |
896 | if (t_protobufServers) { |
897 | for (auto& server : *t_protobufServers) { | |
898 | server->stop(); | |
899 | } | |
900 | t_protobufServers.reset(); | |
63341e8d RG |
901 | } |
902 | ||
903 | return false; | |
904 | } | |
905 | ||
906 | /* if the server was not running, or if it was running according to a | |
907 | previous configuration */ | |
b773359c RG |
908 | if (!t_protobufServers || |
909 | t_protobufServersGeneration < luaconfsLocal->generation) { | |
63341e8d | 910 | |
b773359c RG |
911 | if (t_protobufServers) { |
912 | for (auto& server : *t_protobufServers) { | |
913 | server->stop(); | |
914 | } | |
63341e8d | 915 | } |
b773359c | 916 | t_protobufServers.reset(); |
63341e8d | 917 | |
b773359c RG |
918 | t_protobufServers = startProtobufServers(luaconfsLocal->protobufExportConfig); |
919 | t_protobufServersGeneration = luaconfsLocal->generation; | |
63341e8d RG |
920 | } |
921 | ||
922 | return true; | |
923 | } | |
924 | ||
925 | static bool checkOutgoingProtobufExport(LocalStateHolder<LuaConfigItems>& luaconfsLocal) | |
926 | { | |
927 | if (!luaconfsLocal->outgoingProtobufExportConfig.enabled) { | |
b773359c RG |
928 | if (t_outgoingProtobufServers) { |
929 | for (auto& server : *t_outgoingProtobufServers) { | |
930 | server->stop(); | |
931 | } | |
63341e8d | 932 | } |
b773359c | 933 | t_outgoingProtobufServers.reset(); |
63341e8d RG |
934 | |
935 | return false; | |
936 | } | |
937 | ||
938 | /* if the server was not running, or if it was running according to a | |
939 | previous configuration */ | |
b773359c RG |
940 | if (!t_outgoingProtobufServers || |
941 | t_outgoingProtobufServersGeneration < luaconfsLocal->generation) { | |
63341e8d | 942 | |
b773359c RG |
943 | if (t_outgoingProtobufServers) { |
944 | for (auto& server : *t_outgoingProtobufServers) { | |
945 | server->stop(); | |
946 | } | |
63341e8d | 947 | } |
b773359c | 948 | t_outgoingProtobufServers.reset(); |
63341e8d | 949 | |
b773359c RG |
950 | t_outgoingProtobufServers = startProtobufServers(luaconfsLocal->outgoingProtobufExportConfig); |
951 | t_outgoingProtobufServersGeneration = luaconfsLocal->generation; | |
63341e8d RG |
952 | } |
953 | ||
954 | return true; | |
955 | } | |
956 | #endif /* HAVE_PROTOBUF */ | |
957 | ||
af1377b7 | 958 | #ifdef NOD_ENABLED |
41c542ec | 959 | static bool nodCheckNewDomain(const DNSName& dname) |
af1377b7 NC |
960 | { |
961 | static const QType qt(QType::A); | |
962 | static const uint16_t qc(QClass::IN); | |
41c542ec | 963 | bool ret = false; |
af1377b7 NC |
964 | // First check the (sub)domain isn't whitelisted for NOD purposes |
965 | if (!g_nodDomainWL.check(dname)) { | |
966 | // Now check the NODDB (note this is probablistic so can have FNs/FPs) | |
967 | if (t_nodDBp && t_nodDBp->isNewDomain(dname)) { | |
968 | if (g_nodLog) { | |
969 | // This should probably log to a dedicated log file | |
970 | g_log<<Logger::Notice<<"Newly observed domain nod="<<dname.toLogString()<<endl; | |
971 | } | |
972 | if (!(g_nodLookupDomain.isRoot())) { | |
973 | // Send a DNS A query to <domain>.g_nodLookupDomain | |
974 | DNSName qname = dname; | |
975 | vector<DNSRecord> dummy; | |
976 | qname += g_nodLookupDomain; | |
977 | directResolve(qname, qt, qc, dummy); | |
978 | } | |
41c542ec | 979 | ret = true; |
af1377b7 NC |
980 | } |
981 | } | |
41c542ec | 982 | return ret; |
af1377b7 NC |
983 | } |
984 | ||
985 | static void nodAddDomain(const DNSName& dname) | |
986 | { | |
987 | // Don't bother adding domains on the nod whitelist | |
988 | if (!g_nodDomainWL.check(dname)) { | |
989 | if (t_nodDBp) { | |
990 | // This keeps the nod info up to date | |
991 | t_nodDBp->addDomain(dname); | |
992 | } | |
993 | } | |
994 | } | |
41c542ec NC |
995 | |
996 | static bool udrCheckUniqueDNSRecord(const DNSName& dname, uint16_t qtype, const DNSRecord& record) | |
997 | { | |
998 | bool ret = false; | |
999 | if (record.d_place == DNSResourceRecord::ANSWER || | |
1000 | record.d_place == DNSResourceRecord::ADDITIONAL) { | |
1001 | // Create a string that represent a triplet of (qname, qtype and RR[type, name, content]) | |
1002 | std::stringstream ss; | |
1003 | ss << dname.toDNSStringLC() << ":" << qtype << ":" << qtype << ":" << record.d_type << ":" << record.d_name.toDNSStringLC() << ":" << record.d_content->getZoneRepresentation(); | |
1004 | if (t_udrDBp && t_udrDBp->isUniqueResponse(ss.str())) { | |
ff4d391d NC |
1005 | if (g_udrLog) { |
1006 | // This should also probably log to a dedicated file. | |
1007 | g_log<<Logger::Notice<<"Unique response observed: qname="<<dname.toLogString()<<" qtype="<<QType(qtype).getName()<< " rrtype=" << QType(record.d_type).getName() << " rrname=" << record.d_name.toLogString() << " rrcontent=" << record.d_content->getZoneRepresentation() << endl; | |
41c542ec NC |
1008 | } |
1009 | ret = true; | |
1010 | } | |
1011 | } | |
1012 | return ret; | |
1013 | } | |
af1377b7 NC |
1014 | #endif /* NOD_ENABLED */ |
1015 | ||
d187038c | 1016 | static void startDoResolve(void *p) |
288f4aa9 | 1017 | { |
9a864da4 | 1018 | auto dc=std::unique_ptr<DNSComboWriter>(reinterpret_cast<DNSComboWriter*>(p)); |
288f4aa9 | 1019 | try { |
5af86fdc RG |
1020 | if (t_queryring) |
1021 | t_queryring->push_back(make_pair(dc->d_mdp.d_qname, dc->d_mdp.d_qtype)); | |
92011b8f | 1022 | |
32015748 | 1023 | uint16_t maxanswersize = dc->d_tcp ? 65535 : min(static_cast<uint16_t>(512), g_udpTruncationThreshold); |
7f7b8d55 | 1024 | EDNSOpts edo; |
5164bac3 | 1025 | std::vector<pair<uint16_t, string> > ednsOpts; |
eb9444be | 1026 | bool variableAnswer = dc->d_variable; |
8e079f3a | 1027 | bool haveEDNS=false; |
ca2526f5 NC |
1028 | #ifdef NOD_ENABLED |
1029 | bool hasUDR = false; | |
1030 | #endif /* NOD_ENABLED */ | |
f1db0de2 PL |
1031 | DNSPacketWriter::optvect_t returnedEdnsOptions; // Here we stuff all the options for the return packet |
1032 | uint8_t ednsExtRCode = 0; | |
8e079f3a | 1033 | if(getEDNSOpts(dc->d_mdp, &edo)) { |
f1db0de2 PL |
1034 | haveEDNS=true; |
1035 | if (edo.d_version != 0) { | |
1036 | ednsExtRCode = ERCode::BADVERS; | |
1037 | } | |
1038 | ||
32015748 RG |
1039 | if(!dc->d_tcp) { |
1040 | /* rfc6891 6.2.3: | |
1041 | "Values lower than 512 MUST be treated as equal to 512." | |
1042 | */ | |
1043 | maxanswersize = min(static_cast<uint16_t>(edo.d_packetsize >= 512 ? edo.d_packetsize : 512), g_udpTruncationThreshold); | |
1044 | } | |
5164bac3 | 1045 | ednsOpts = edo.d_options; |
8e079f3a | 1046 | haveEDNS=true; |
3af35968 | 1047 | maxanswersize -= 11; // EDNS header size |
b40562da | 1048 | |
1f691b94 PL |
1049 | for (const auto& o : edo.d_options) { |
1050 | if (o.first == EDNSOptionCode::ECS && g_useIncomingECS && !dc->d_ecsParsed) { | |
1051 | dc->d_ecsFound = getEDNSSubnetOptsFromString(o.second, &dc->d_ednssubnet); | |
1052 | } else if (o.first == EDNSOptionCode::NSID) { | |
f1db0de2 | 1053 | const static string mode_server_id = ::arg()["server-id"]; |
8a42919a PL |
1054 | if(mode_server_id != "disabled" && !mode_server_id.empty() && |
1055 | maxanswersize > (2 + 2 + mode_server_id.size())) { | |
f1db0de2 PL |
1056 | returnedEdnsOptions.push_back(make_pair(EDNSOptionCode::NSID, mode_server_id)); |
1057 | variableAnswer = true; // Can't packetcache an answer with NSID | |
1058 | // Option Code and Option Length are both 2 | |
1059 | maxanswersize -= 2 + 2 + mode_server_id.size(); | |
1060 | } | |
b40562da RG |
1061 | } |
1062 | } | |
10321a98 | 1063 | } |
b40562da RG |
1064 | /* perhaps there was no EDNS or no ECS but by now we looked */ |
1065 | dc->d_ecsParsed = true; | |
e325f20c | 1066 | vector<DNSRecord> ret; |
ea634573 | 1067 | vector<uint8_t> packet; |
b23b8614 | 1068 | |
ad42489c | 1069 | auto luaconfsLocal = g_luaconfs.getLocal(); |
b8470add PL |
1070 | // Used to tell syncres later on if we should apply NSDNAME and NSIP RPZ triggers for this query |
1071 | bool wantsRPZ(true); | |
1fbc6dc5 | 1072 | boost::optional<RecProtoBufMessage> pbMessage(boost::none); |
f1c7929a | 1073 | bool logResponse = false; |
aa7929a3 | 1074 | #ifdef HAVE_PROTOBUF |
63341e8d | 1075 | if (checkProtobufExport(luaconfsLocal)) { |
b773359c | 1076 | logResponse = t_protobufServers && luaconfsLocal->protobufExportConfig.logResponses; |
5cc8371b | 1077 | Netmask requestorNM(dc->d_source, dc->d_source.sin4.sin_family == AF_INET ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
e1c8a4bb | 1078 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); |
0bd2e252 | 1079 | pbMessage = RecProtoBufMessage(RecProtoBufMessage::Response, dc->d_uuid, &requestor, &dc->d_destination, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass, dc->d_mdp.d_header.id, dc->d_tcp, 0); |
c165308b | 1080 | pbMessage->setServerIdentity(SyncRes::s_serverID); |
d362f7c1 | 1081 | pbMessage->setEDNSSubnet(dc->d_ednssubnet.source, dc->d_ednssubnet.source.isIpv4() ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
d9d3f9c1 RG |
1082 | } |
1083 | #endif /* HAVE_PROTOBUF */ | |
ad42489c | 1084 | |
3ddb9247 | 1085 | DNSPacketWriter pw(packet, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass); |
ea634573 BH |
1086 | |
1087 | pw.getHeader()->aa=0; | |
1088 | pw.getHeader()->ra=1; | |
c154c8a4 | 1089 | pw.getHeader()->qr=1; |
bb4bdbaf | 1090 | pw.getHeader()->tc=0; |
ea634573 | 1091 | pw.getHeader()->id=dc->d_mdp.d_header.id; |
10321a98 | 1092 | pw.getHeader()->rd=dc->d_mdp.d_header.rd; |
57769f13 | 1093 | pw.getHeader()->cd=dc->d_mdp.d_header.cd; |
ea634573 | 1094 | |
70fb28d9 RG |
1095 | /* This is the lowest TTL seen in the records of the response, |
1096 | so we can't cache it for longer than this value. | |
1097 | If we have a TTL cap, this value can't be larger than the | |
1098 | cap no matter what. */ | |
1099 | uint32_t minTTL = dc->d_ttlCap; | |
904d3219 PD |
1100 | |
1101 | SyncRes sr(dc->d_now); | |
0c43f455 | 1102 | |
2e921ec6 | 1103 | bool DNSSECOK=false; |
3457a2a0 | 1104 | if(t_pdl) { |
f26bf547 | 1105 | sr.setLuaEngine(t_pdl); |
3457a2a0 | 1106 | } |
9eec8c98 | 1107 | if(g_dnssecmode != DNSSECMode::Off) { |
30ee601a | 1108 | sr.setDoDNSSEC(true); |
9eec8c98 PL |
1109 | |
1110 | // Does the requestor want DNSSEC records? | |
d6c335ab | 1111 | if(edo.d_extFlags & EDNSOpts::DNSSECOK) { |
9eec8c98 PL |
1112 | DNSSECOK=true; |
1113 | g_stats.dnssecQueries++; | |
1114 | } | |
88c33dca RG |
1115 | if (dc->d_mdp.d_header.cd) { |
1116 | /* Per rfc6840 section 5.9, "When processing a request with | |
1117 | the Checking Disabled (CD) bit set, a resolver SHOULD attempt | |
1118 | to return all response data, even data that has failed DNSSEC | |
1119 | validation. */ | |
1120 | ++g_stats.dnssecCheckDisabledQueries; | |
1121 | } | |
1122 | if (dc->d_mdp.d_header.ad) { | |
1123 | /* Per rfc6840 section 5.7, "the AD bit in a query as a signal | |
1124 | indicating that the requester understands and is interested in the | |
1125 | value of the AD bit in the response. This allows a requester to | |
1126 | indicate that it understands the AD bit without also requesting | |
1127 | DNSSEC data via the DO bit. */ | |
1128 | ++g_stats.dnssecAuthenticDataQueries; | |
1129 | } | |
9eec8c98 PL |
1130 | } else { |
1131 | // Ignore the client-set CD flag | |
1132 | pw.getHeader()->cd=0; | |
5b9853c9 | 1133 | } |
0c43f455 RG |
1134 | sr.setDNSSECValidationRequested(g_dnssecmode == DNSSECMode::ValidateAll || g_dnssecmode==DNSSECMode::ValidateForLog || ((dc->d_mdp.d_header.ad || DNSSECOK) && g_dnssecmode==DNSSECMode::Process)); |
1135 | ||
4898a348 | 1136 | #ifdef HAVE_PROTOBUF |
30ee601a | 1137 | sr.setInitialRequestId(dc->d_uuid); |
b773359c | 1138 | sr.setOutgoingProtobufServers(t_outgoingProtobufServers); |
4898a348 | 1139 | #endif |
0c43f455 | 1140 | |
2fe3354d | 1141 | sr.setQuerySource(dc->d_remote, g_useIncomingECS && !dc->d_ednssubnet.source.empty() ? boost::optional<const EDNSSubnetOpts&>(dc->d_ednssubnet) : boost::none); |
57769f13 | 1142 | |
904d3219 | 1143 | bool tracedQuery=false; // we could consider letting Lua know about this too |
9fc36e90 | 1144 | bool shouldNotValidate = false; |
904d3219 | 1145 | |
ef3b6cd7 RG |
1146 | /* preresolve expects res (dq.rcode) to be set to RCode::NoError by default */ |
1147 | int res = RCode::NoError; | |
1f1ca368 | 1148 | DNSFilterEngine::Policy appliedPolicy; |
39ec5d29 | 1149 | DNSRecord spoofed; |
f1c7929a | 1150 | RecursorLua4::DNSQuestion dq(dc->d_source, dc->d_destination, dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_tcp, variableAnswer, wantsRPZ, logResponse); |
d6c335ab | 1151 | dq.ednsFlags = &edo.d_extFlags; |
5164bac3 | 1152 | dq.ednsOptions = &ednsOpts; |
6e505c5e RG |
1153 | dq.tag = dc->d_tag; |
1154 | dq.discardedPolicies = &sr.d_discardedPolicies; | |
1155 | dq.policyTags = &dc->d_policyTags; | |
1156 | dq.appliedPolicy = &appliedPolicy; | |
1157 | dq.currentRecords = &ret; | |
1158 | dq.dh = &dc->d_mdp.d_header; | |
05c74122 | 1159 | dq.data = dc->d_data; |
67e31ebe RG |
1160 | #ifdef HAVE_PROTOBUF |
1161 | dq.requestorId = dc->d_requestorId; | |
590388d2 | 1162 | dq.deviceId = dc->d_deviceId; |
67e31ebe | 1163 | #endif |
ba21fcfe | 1164 | |
6cf96227 PL |
1165 | if(ednsExtRCode != 0) { |
1166 | goto sendit; | |
1167 | } | |
1168 | ||
e661a20b | 1169 | if(dc->d_mdp.d_qtype==QType::ANY && !dc->d_tcp && g_anyToTcp) { |
56b4d21b PD |
1170 | pw.getHeader()->tc = 1; |
1171 | res = 0; | |
1172 | variableAnswer = true; | |
e661a20b PD |
1173 | goto sendit; |
1174 | } | |
1175 | ||
f26bf547 | 1176 | if(t_traceRegex && t_traceRegex->match(dc->d_mdp.d_qname.toString())) { |
77499b05 BH |
1177 | sr.setLogMode(SyncRes::Store); |
1178 | tracedQuery=true; | |
1179 | } | |
3ddb9247 | 1180 | |
8f7473d7 | 1181 | |
976ec823 | 1182 | if(!g_quiet || tracedQuery) { |
e6a9dde5 | 1183 | g_log<<Logger::Warning<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] " << (dc->d_tcp ? "TCP " : "") << "question for '"<<dc->d_mdp.d_qname<<"|" |
976ec823 | 1184 | <<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)<<"' from "<<dc->getRemote(); |
b40562da | 1185 | if(!dc->d_ednssubnet.source.empty()) { |
e6a9dde5 | 1186 | g_log<<" (ecs "<<dc->d_ednssubnet.source.toString()<<")"; |
6e986f5e | 1187 | } |
e6a9dde5 | 1188 | g_log<<endl; |
976ec823 | 1189 | } |
c75a6a9e | 1190 | |
fededf47 | 1191 | sr.setId(MT->getTid()); |
67828389 | 1192 | if(!dc->d_mdp.d_header.rd) |
c836dc19 BH |
1193 | sr.setCacheOnly(); |
1194 | ||
f26bf547 RG |
1195 | if (t_pdl) { |
1196 | t_pdl->prerpz(dq, res); | |
0a273054 RG |
1197 | } |
1198 | ||
db486de5 | 1199 | // Check if the query has a policy attached to it |
0a273054 | 1200 | if (wantsRPZ) { |
5cc8371b | 1201 | appliedPolicy = luaconfsLocal->dfe.getQueryPolicy(dc->d_mdp.d_qname, dc->d_source, sr.d_discardedPolicies); |
0a273054 | 1202 | } |
644dd1da | 1203 | |
54be222b | 1204 | // if there is a RecursorLua active, and it 'took' the query in preResolve, we don't launch beginResolve |
f26bf547 | 1205 | if(!t_pdl || !t_pdl->preresolve(dq, res)) { |
b8470add | 1206 | |
30ee601a | 1207 | sr.setWantsRPZ(wantsRPZ); |
b8470add PL |
1208 | if(wantsRPZ) { |
1209 | switch(appliedPolicy.d_kind) { | |
1210 | case DNSFilterEngine::PolicyKind::NoAction: | |
1211 | break; | |
1212 | case DNSFilterEngine::PolicyKind::Drop: | |
1213 | g_stats.policyDrops++; | |
7a25883a | 1214 | g_stats.policyResults[appliedPolicy.d_kind]++; |
b8470add PL |
1215 | return; |
1216 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
1217 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1218 | res=RCode::NXDomain; | |
1219 | goto haveAnswer; | |
1220 | case DNSFilterEngine::PolicyKind::NODATA: | |
1221 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1222 | res=RCode::NoError; | |
db486de5 | 1223 | goto haveAnswer; |
b8470add PL |
1224 | case DNSFilterEngine::PolicyKind::Custom: |
1225 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1226 | res=RCode::NoError; | |
a9e029ee | 1227 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 1228 | ret.push_back(spoofed); |
53508135 | 1229 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
1230 | goto haveAnswer; |
1231 | case DNSFilterEngine::PolicyKind::Truncate: | |
1232 | if(!dc->d_tcp) { | |
1233 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1234 | res=RCode::NoError; | |
1235 | pw.getHeader()->tc=1; | |
1236 | goto haveAnswer; | |
1237 | } | |
1238 | break; | |
1239 | } | |
db486de5 PL |
1240 | } |
1241 | ||
b8470add | 1242 | // Query got not handled for QNAME Policy reasons, now actually go out to find an answer |
44971ca0 PD |
1243 | try { |
1244 | res = sr.beginResolve(dc->d_mdp.d_qname, QType(dc->d_mdp.d_qtype), dc->d_mdp.d_qclass, ret); | |
9fc36e90 | 1245 | shouldNotValidate = sr.wasOutOfBand(); |
44971ca0 PD |
1246 | } |
1247 | catch(ImmediateServFailException &e) { | |
854d44e3 | 1248 | if(g_logCommonErrors) |
e6a9dde5 | 1249 | g_log<<Logger::Notice<<"Sending SERVFAIL to "<<dc->getRemote()<<" during resolve of '"<<dc->d_mdp.d_qname<<"' because: "<<e.reason<<endl; |
44971ca0 PD |
1250 | res = RCode::ServFail; |
1251 | } | |
4485aa35 | 1252 | |
1921a4c2 RG |
1253 | dq.validationState = sr.getValidationState(); |
1254 | ||
b8470add PL |
1255 | // During lookup, an NSDNAME or NSIP trigger was hit in RPZ |
1256 | if (res == -2) { // XXX This block should be macro'd, it is repeated post-resolve. | |
1257 | appliedPolicy = sr.d_appliedPolicy; | |
1258 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1259 | switch(appliedPolicy.d_kind) { | |
1260 | case DNSFilterEngine::PolicyKind::NoAction: // This can never happen | |
1261 | throw PDNSException("NoAction policy returned while a NSDNAME or NSIP trigger was hit"); | |
1262 | case DNSFilterEngine::PolicyKind::Drop: | |
1263 | g_stats.policyDrops++; | |
b8470add PL |
1264 | return; |
1265 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
1266 | ret.clear(); | |
1267 | res=RCode::NXDomain; | |
1268 | goto haveAnswer; | |
1269 | ||
1270 | case DNSFilterEngine::PolicyKind::NODATA: | |
1271 | ret.clear(); | |
1272 | res=RCode::NoError; | |
1273 | goto haveAnswer; | |
1274 | ||
1275 | case DNSFilterEngine::PolicyKind::Truncate: | |
1276 | if(!dc->d_tcp) { | |
1277 | ret.clear(); | |
1278 | res=RCode::NoError; | |
1279 | pw.getHeader()->tc=1; | |
1280 | goto haveAnswer; | |
1281 | } | |
1282 | break; | |
1283 | ||
1284 | case DNSFilterEngine::PolicyKind::Custom: | |
1285 | ret.clear(); | |
1286 | res=RCode::NoError; | |
a9e029ee | 1287 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 1288 | ret.push_back(spoofed); |
53508135 | 1289 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
1290 | goto haveAnswer; |
1291 | } | |
1292 | } | |
1293 | ||
1294 | if (wantsRPZ) { | |
1f1ca368 | 1295 | appliedPolicy = luaconfsLocal->dfe.getPostPolicy(ret, sr.d_discardedPolicies); |
b8470add | 1296 | } |
db486de5 | 1297 | |
f26bf547 | 1298 | if(t_pdl) { |
db486de5 PL |
1299 | if(res == RCode::NoError) { |
1300 | auto i=ret.cbegin(); | |
1301 | for(; i!= ret.cend(); ++i) | |
1302 | if(i->d_type == dc->d_mdp.d_qtype && i->d_place == DNSResourceRecord::ANSWER) | |
1303 | break; | |
f26bf547 | 1304 | if(i == ret.cend() && t_pdl->nodata(dq, res)) |
3ca4e735 PL |
1305 | shouldNotValidate = true; |
1306 | ||
db486de5 | 1307 | } |
f26bf547 | 1308 | else if(res == RCode::NXDomain && t_pdl->nxdomain(dq, res)) |
3ca4e735 | 1309 | shouldNotValidate = true; |
db486de5 | 1310 | |
f26bf547 | 1311 | if(t_pdl->postresolve(dq, res)) |
3ca4e735 | 1312 | shouldNotValidate = true; |
db486de5 PL |
1313 | } |
1314 | ||
b8470add PL |
1315 | if (wantsRPZ) { //XXX This block is repeated, see above |
1316 | g_stats.policyResults[appliedPolicy.d_kind]++; | |
1317 | switch(appliedPolicy.d_kind) { | |
1318 | case DNSFilterEngine::PolicyKind::NoAction: | |
1319 | break; | |
1320 | case DNSFilterEngine::PolicyKind::Drop: | |
1321 | g_stats.policyDrops++; | |
b8470add PL |
1322 | return; |
1323 | case DNSFilterEngine::PolicyKind::NXDOMAIN: | |
1324 | ret.clear(); | |
1325 | res=RCode::NXDomain; | |
1326 | goto haveAnswer; | |
1327 | ||
1328 | case DNSFilterEngine::PolicyKind::NODATA: | |
1329 | ret.clear(); | |
1330 | res=RCode::NoError; | |
1331 | goto haveAnswer; | |
1332 | ||
1333 | case DNSFilterEngine::PolicyKind::Truncate: | |
1334 | if(!dc->d_tcp) { | |
1335 | ret.clear(); | |
1336 | res=RCode::NoError; | |
1337 | pw.getHeader()->tc=1; | |
1338 | goto haveAnswer; | |
1339 | } | |
1340 | break; | |
1341 | ||
1342 | case DNSFilterEngine::PolicyKind::Custom: | |
1343 | ret.clear(); | |
1344 | res=RCode::NoError; | |
a9e029ee | 1345 | spoofed=appliedPolicy.getCustomRecord(dc->d_mdp.d_qname); |
b8470add | 1346 | ret.push_back(spoofed); |
53508135 | 1347 | handleRPZCustom(spoofed, QType(dc->d_mdp.d_qtype), sr, res, ret); |
b8470add PL |
1348 | goto haveAnswer; |
1349 | } | |
644dd1da | 1350 | } |
4485aa35 | 1351 | } |
644dd1da | 1352 | haveAnswer:; |
3e8216c8 | 1353 | if(res == PolicyDecision::DROP) { |
e9c2ad3a | 1354 | g_stats.policyDrops++; |
ae7e77ad | 1355 | return; |
3ddb9247 | 1356 | } |
9cdfab64 | 1357 | if(tracedQuery || res == -1 || res == RCode::ServFail || pw.getHeader()->rcode == RCode::ServFail) |
1dc8f4d0 | 1358 | { |
85ffbc53 PD |
1359 | string trace(sr.getTrace()); |
1360 | if(!trace.empty()) { | |
1361 | vector<string> lines; | |
1362 | boost::split(lines, trace, boost::is_any_of("\n")); | |
1dc8f4d0 | 1363 | for(const string& line : lines) { |
85ffbc53 | 1364 | if(!line.empty()) |
e6a9dde5 | 1365 | g_log<<Logger::Warning<< line << endl; |
85ffbc53 PD |
1366 | } |
1367 | } | |
1368 | } | |
3ddb9247 | 1369 | |
9cdfab64 | 1370 | if(res == -1) { |
0fe1d080 PD |
1371 | pw.getHeader()->rcode=RCode::ServFail; |
1372 | // no commit here, because no record | |
1373 | g_stats.servFails++; | |
1374 | } | |
288f4aa9 | 1375 | else { |
ea634573 | 1376 | pw.getHeader()->rcode=res; |
92011b8f | 1377 | |
f3fe4ae6 | 1378 | // Does the validation mode or query demand validation? |
0c43f455 | 1379 | if(!shouldNotValidate && sr.isDNSSECValidationRequested()) { |
b25cae9a | 1380 | try { |
f3fe4ae6 | 1381 | if(sr.doLog()) { |
e6a9dde5 | 1382 | g_log<<Logger::Warning<<"Starting validation of answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<endl; |
2e921ec6 | 1383 | } |
4d2be65d RG |
1384 | |
1385 | auto state = sr.getValidationState(); | |
1386 | ||
b25cae9a | 1387 | if(state == Secure) { |
2e921ec6 | 1388 | if(sr.doLog()) { |
e6a9dde5 | 1389 | g_log<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<" validates correctly"<<endl; |
2e921ec6 | 1390 | } |
b25cae9a | 1391 | |
1392 | // Is the query source interested in the value of the ad-bit? | |
885c8881 | 1393 | if (dc->d_mdp.d_header.ad || DNSSECOK) |
b25cae9a | 1394 | pw.getHeader()->ad=1; |
1395 | } | |
1396 | else if(state == Insecure) { | |
f3fe4ae6 | 1397 | if(sr.doLog()) { |
e6a9dde5 | 1398 | g_log<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<" validates as Insecure"<<endl; |
12ce523e | 1399 | } |
b25cae9a | 1400 | |
1401 | pw.getHeader()->ad=0; | |
f3fe4ae6 | 1402 | } |
b25cae9a | 1403 | else if(state == Bogus) { |
66f2e6ad KM |
1404 | if(t_bogusremotes) |
1405 | t_bogusremotes->push_back(dc->d_source); | |
1406 | if(t_bogusqueryring) | |
1407 | t_bogusqueryring->push_back(make_pair(dc->d_mdp.d_qname, dc->d_mdp.d_qtype)); | |
c87e1876 | 1408 | if(g_dnssecLogBogus || sr.doLog() || g_dnssecmode == DNSSECMode::ValidateForLog) { |
e6a9dde5 | 1409 | g_log<<Logger::Warning<<"Answer to "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" for "<<dc->getRemote()<<" validates as Bogus"<<endl; |
b25cae9a | 1410 | } |
1411 | ||
1412 | // Does the query or validation mode sending out a SERVFAIL on validation errors? | |
885c8881 | 1413 | if(!pw.getHeader()->cd && (g_dnssecmode == DNSSECMode::ValidateAll || dc->d_mdp.d_header.ad || DNSSECOK)) { |
b25cae9a | 1414 | if(sr.doLog()) { |
e6a9dde5 | 1415 | g_log<<Logger::Warning<<"Sending out SERVFAIL for "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" because recursor or query demands it for Bogus results"<<endl; |
b25cae9a | 1416 | } |
1417 | ||
1418 | pw.getHeader()->rcode=RCode::ServFail; | |
1419 | goto sendit; | |
1420 | } else { | |
1421 | if(sr.doLog()) { | |
e6a9dde5 | 1422 | g_log<<Logger::Warning<<"Not sending out SERVFAIL for "<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<" Bogus validation since neither config nor query demands this"<<endl; |
b25cae9a | 1423 | } |
1424 | } | |
1425 | } | |
1426 | } | |
1427 | catch(ImmediateServFailException &e) { | |
1428 | if(g_logCommonErrors) | |
e6a9dde5 | 1429 | g_log<<Logger::Notice<<"Sending SERVFAIL to "<<dc->getRemote()<<" during validation of '"<<dc->d_mdp.d_qname<<"|"<<QType(dc->d_mdp.d_qtype).getName()<<"' because: "<<e.reason<<endl; |
b25cae9a | 1430 | pw.getHeader()->rcode=RCode::ServFail; |
1431 | goto sendit; | |
f3fe4ae6 | 1432 | } |
b3f0ed10 | 1433 | } |
1434 | ||
c154c8a4 | 1435 | if(ret.size()) { |
92476c8b | 1436 | orderAndShuffle(ret); |
5cc8371b | 1437 | if(auto sl = luaconfsLocal->sortlist.getOrderCmp(dc->d_source)) { |
20d84f77 | 1438 | stable_sort(ret.begin(), ret.end(), *sl); |
3e61e7f7 | 1439 | variableAnswer=true; |
1440 | } | |
8e079f3a | 1441 | } |
0afa32d4 RG |
1442 | |
1443 | bool needCommit = false; | |
8e079f3a | 1444 | for(auto i=ret.cbegin(); i!=ret.cend(); ++i) { |
3e80ebce KM |
1445 | if( ! DNSSECOK && |
1446 | ( i->d_type == QType::NSEC3 || | |
1447 | ( | |
1448 | ( i->d_type == QType::RRSIG || i->d_type==QType::NSEC ) && | |
1449 | ( | |
1450 | ( dc->d_mdp.d_qtype != i->d_type && dc->d_mdp.d_qtype != QType::ANY ) || | |
1451 | i->d_place != DNSResourceRecord::ANSWER | |
1452 | ) | |
1453 | ) | |
1454 | ) | |
1455 | ) { | |
2e921ec6 | 1456 | continue; |
3e80ebce KM |
1457 | } |
1458 | ||
70fb28d9 | 1459 | if (!addRecordToPacket(pw, *i, minTTL, dc->d_ttlCap, maxanswersize)) { |
97c6d7e5 RG |
1460 | needCommit = false; |
1461 | break; | |
1462 | } | |
1463 | needCommit = true; | |
1464 | ||
41c542ec NC |
1465 | #ifdef NOD_ENABLED |
1466 | bool udr = false; | |
1467 | if (g_udrEnabled) { | |
1468 | udr = udrCheckUniqueDNSRecord(dc->d_mdp.d_qname, dc->d_mdp.d_qtype, *i); | |
ca2526f5 NC |
1469 | if (!hasUDR && udr) |
1470 | hasUDR = true; | |
41c542ec NC |
1471 | } |
1472 | #endif /* NOD ENABLED */ | |
1473 | ||
aa7929a3 | 1474 | #ifdef HAVE_PROTOBUF |
b773359c | 1475 | if (t_protobufServers) { |
41c542ec NC |
1476 | #ifdef NOD_ENABLED |
1477 | pbMessage->addRR(*i, luaconfsLocal->protobufExportConfig.exportTypes, udr); | |
1478 | #else | |
0bd2e252 | 1479 | pbMessage->addRR(*i, luaconfsLocal->protobufExportConfig.exportTypes); |
41c542ec | 1480 | #endif /* NOD_ENABLED */ |
aa7929a3 RG |
1481 | } |
1482 | #endif | |
ea634573 | 1483 | } |
0afa32d4 | 1484 | if(needCommit) |
8e079f3a | 1485 | pw.commit(); |
288f4aa9 | 1486 | } |
10321a98 | 1487 | sendit:; |
b3f0ed10 | 1488 | |
5a7f99b4 | 1489 | if(g_useIncomingECS && haveEDNS && !sr.wasVariable()) { |
1490 | EDNSSubnetOpts eo; | |
1491 | eo.source = dc->d_ednssubnet.source; | |
1492 | ComboAddress sa; | |
1493 | memset(&sa, 0, sizeof(sa)); | |
1494 | sa.sin4.sin_family = eo.source.getNetwork().sin4.sin_family; | |
1495 | eo.scope = Netmask(sa, 0); | |
1496 | ||
1497 | returnedEdnsOptions.push_back(make_pair(EDNSOptionCode::ECS, makeEDNSSubnetOptsString(eo))); | |
1498 | } | |
1499 | ||
97c6d7e5 RG |
1500 | if (haveEDNS) { |
1501 | /* we try to add the EDNS OPT RR even for truncated answers, | |
1502 | as rfc6891 states: | |
1503 | "The minimal response MUST be the DNS header, question section, and an | |
1504 | OPT record. This MUST also occur when a truncated response (using | |
1505 | the DNS header's TC bit) is returned." | |
1506 | */ | |
9b60fb71 | 1507 | pw.addOpt(512, ednsExtRCode, DNSSECOK ? EDNSOpts::DNSSECOK : 0, returnedEdnsOptions); |
1f691b94 | 1508 | pw.commit(); |
97c6d7e5 RG |
1509 | } |
1510 | ||
79332bff | 1511 | g_rs.submitResponse(dc->d_mdp.d_qtype, packet.size(), !dc->d_tcp); |
5cc8371b | 1512 | updateResponseStats(res, dc->d_source, packet.size(), &dc->d_mdp.d_qname, dc->d_mdp.d_qtype); |
ff4d391d NC |
1513 | #ifdef NOD_ENABLED |
1514 | bool nod = false; | |
1515 | if (g_nodEnabled) { | |
1516 | if (nodCheckNewDomain(dc->d_mdp.d_qname)) | |
1517 | nod = true; | |
1518 | } | |
1519 | #endif /* NOD_ENABLED */ | |
aa7929a3 | 1520 | #ifdef HAVE_PROTOBUF |
b773359c | 1521 | if (t_protobufServers && logResponse && !(luaconfsLocal->protobufExportConfig.taggedOnly && (!appliedPolicy.d_name || appliedPolicy.d_name->empty()) && dc->d_policyTags.empty())) { |
d362f7c1 RG |
1522 | pbMessage->setBytes(packet.size()); |
1523 | pbMessage->setResponseCode(pw.getHeader()->rcode); | |
0a273054 | 1524 | if (appliedPolicy.d_name) { |
d362f7c1 RG |
1525 | pbMessage->setAppliedPolicy(*appliedPolicy.d_name); |
1526 | pbMessage->setAppliedPolicyType(appliedPolicy.d_type); | |
0a273054 | 1527 | } |
d362f7c1 RG |
1528 | pbMessage->setPolicyTags(dc->d_policyTags); |
1529 | pbMessage->setQueryTime(dc->d_now.tv_sec, dc->d_now.tv_usec); | |
1530 | pbMessage->setRequestorId(dq.requestorId); | |
1531 | pbMessage->setDeviceId(dq.deviceId); | |
41c542ec NC |
1532 | #ifdef NOD_ENABLED |
1533 | if (g_nodEnabled) { | |
ca2526f5 | 1534 | if (nod) { |
41c542ec | 1535 | pbMessage->setNOD(true); |
ca2526f5 NC |
1536 | pbMessage->addPolicyTag(g_nod_pbtag); |
1537 | } | |
1538 | if (hasUDR) { | |
1539 | pbMessage->addPolicyTag(g_udr_pbtag); | |
1540 | } | |
41c542ec NC |
1541 | } |
1542 | #endif /* NOD_ENABLED */ | |
b773359c | 1543 | protobufLogResponse(*pbMessage); |
ac238ea7 | 1544 | #ifdef NOD_ENABLED |
ca2526f5 NC |
1545 | if (g_nodEnabled) { |
1546 | pbMessage->setNOD(false); | |
1547 | pbMessage->clearUDR(); | |
1548 | if (nod) | |
1549 | pbMessage->removePolicyTag(g_nod_pbtag); | |
1550 | if (hasUDR) | |
1551 | pbMessage->removePolicyTag(g_udr_pbtag); | |
1552 | } | |
ac238ea7 | 1553 | #endif /* NOD_ENABLED */ |
aa7929a3 RG |
1554 | } |
1555 | #endif | |
ea634573 | 1556 | if(!dc->d_tcp) { |
b71b60ee | 1557 | struct msghdr msgh; |
1558 | struct iovec iov; | |
1559 | char cbuf[256]; | |
1560 | fillMSGHdr(&msgh, &iov, cbuf, 0, (char*)&*packet.begin(), packet.size(), &dc->d_remote); | |
2c0af54f PD |
1561 | msgh.msg_control=NULL; |
1562 | ||
cbc03320 | 1563 | if(g_fromtosockets.count(dc->d_socket)) { |
fbe2a2e0 | 1564 | addCMsgSrcAddr(&msgh, cbuf, &dc->d_local, 0); |
2c0af54f | 1565 | } |
cbc03320 | 1566 | if(sendmsg(dc->d_socket, &msgh, 0) < 0 && g_logCommonErrors) |
e6a9dde5 | 1567 | g_log<<Logger::Warning<<"Sending UDP reply to client "<<dc->getRemote()<<" failed with: "<<strerror(errno)<<endl; |
70fb28d9 | 1568 | |
3762e821 | 1569 | if(!SyncRes::s_nopacketcache && !variableAnswer && !sr.wasVariable() ) { |
b5e675a7 | 1570 | t_packetCache->insertResponsePacket(dc->d_tag, dc->d_qhash, std::move(dc->d_query), dc->d_mdp.d_qname, dc->d_mdp.d_qtype, dc->d_mdp.d_qclass, |
76e2b9e3 | 1571 | string((const char*)&*packet.begin(), packet.size()), |
3ddb9247 | 1572 | g_now.tv_sec, |
76e2b9e3 | 1573 | pw.getHeader()->rcode == RCode::ServFail ? SyncRes::s_packetcacheservfailttl : |
d9d3f9c1 | 1574 | min(minTTL,SyncRes::s_packetcachettl), |
88694a6a | 1575 | dq.validationState, |
08b02366 RG |
1576 | dc->d_ecsBegin, |
1577 | dc->d_ecsEnd, | |
4b0bdd5f | 1578 | std::move(pbMessage)); |
1051f8a9 | 1579 | } |
3762e821 | 1580 | // else cerr<<"Not putting in packet cache: "<<sr.wasVariable()<<endl; |
feccc9fc | 1581 | } |
9c495589 BH |
1582 | else { |
1583 | char buf[2]; | |
ea634573 BH |
1584 | buf[0]=packet.size()/256; |
1585 | buf[1]=packet.size()%256; | |
feccc9fc | 1586 | |
c038218b | 1587 | Utility::iovec iov[2]; |
feccc9fc | 1588 | |
ea634573 BH |
1589 | iov[0].iov_base=(void*)buf; iov[0].iov_len=2; |
1590 | iov[1].iov_base=(void*)&*packet.begin(); iov[1].iov_len = packet.size(); | |
feccc9fc | 1591 | |
dd079764 | 1592 | int wret=Utility::writev(dc->d_socket, iov, 2); |
0e9d9ce2 | 1593 | bool hadError=true; |
feccc9fc | 1594 | |
dd079764 | 1595 | if(wret == 0) |
e6a9dde5 | 1596 | g_log<<Logger::Error<<"EOF writing TCP answer to "<<dc->getRemote()<<endl; |
dd079764 | 1597 | else if(wret < 0 ) |
e6a9dde5 | 1598 | g_log<<Logger::Error<<"Error writing TCP answer to "<<dc->getRemote()<<": "<< strerror(errno) <<endl; |
dd079764 | 1599 | else if((unsigned int)wret != 2 + packet.size()) |
e6a9dde5 | 1600 | g_log<<Logger::Error<<"Oops, partial answer sent to "<<dc->getRemote()<<" for "<<dc->d_mdp.d_qname<<" (size="<< (2 + packet.size()) <<", sent "<<wret<<")"<<endl; |
0e9d9ce2 | 1601 | else |
18af64a8 | 1602 | hadError=false; |
3ddb9247 | 1603 | |
09e6702a | 1604 | // update tcp connection status, either by closing or moving to 'BYTE0' |
3ddb9247 | 1605 | |
09e6702a | 1606 | if(hadError) { |
18af64a8 | 1607 | // no need to remove us from FDM, we weren't there |
c36bc97a | 1608 | dc->d_socket = -1; |
09e6702a | 1609 | } |
a6ae6414 | 1610 | else { |
fde296a3 RG |
1611 | dc->d_tcpConnection->queriesCount++; |
1612 | if (g_tcpMaxQueriesPerConn && dc->d_tcpConnection->queriesCount >= g_tcpMaxQueriesPerConn) { | |
1613 | dc->d_socket = -1; | |
1614 | } | |
1615 | else { | |
1616 | dc->d_tcpConnection->state=TCPConnection::BYTE0; | |
1617 | Utility::gettimeofday(&g_now, 0); // needs to be updated | |
1618 | t_fdm->addReadFD(dc->d_socket, handleRunningTCPQuestion, dc->d_tcpConnection); | |
1619 | t_fdm->setReadTTD(dc->d_socket, g_now, g_tcpTimeout); | |
1620 | } | |
0e9d9ce2 | 1621 | } |
9c495589 | 1622 | } |
2c9119cd | 1623 | float spent=makeFloat(sr.getNow()-dc->d_now); |
1d5b3ce6 | 1624 | if(!g_quiet) { |
e6a9dde5 PL |
1625 | g_log<<Logger::Error<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] answer to "<<(dc->d_mdp.d_header.rd?"":"non-rd ")<<"question '"<<dc->d_mdp.d_qname<<"|"<<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype); |
1626 | g_log<<"': "<<ntohs(pw.getHeader()->ancount)<<" answers, "<<ntohs(pw.getHeader()->arcount)<<" additional, took "<<sr.d_outqueries<<" packets, "<< | |
2c9119cd | 1627 | sr.d_totUsec/1000.0<<" netw ms, "<< spent*1000.0<<" tot ms, "<< |
1628 | sr.d_throttledqueries<<" throttled, "<<sr.d_timeouts<<" timeouts, "<<sr.d_tcpoutqueries<<" tcp connections, rcode="<< res; | |
1629 | ||
1630 | if(!shouldNotValidate && sr.isDNSSECValidationRequested()) { | |
e6a9dde5 | 1631 | g_log<< ", dnssec="<<vStates[sr.getValidationState()]; |
2c9119cd | 1632 | } |
1633 | ||
e6a9dde5 | 1634 | g_log<<endl; |
2c9119cd | 1635 | |
c75a6a9e | 1636 | } |
b23b8614 | 1637 | |
f7b8cffa RG |
1638 | if (sr.d_outqueries || sr.d_authzonequeries) { |
1639 | t_RC->cacheMisses++; | |
1640 | } | |
1641 | else { | |
1642 | t_RC->cacheHits++; | |
1643 | } | |
2c9119cd | 1644 | |
fe213470 BH |
1645 | if(spent < 0.001) |
1646 | g_stats.answers0_1++; | |
1647 | else if(spent < 0.010) | |
1648 | g_stats.answers1_10++; | |
1649 | else if(spent < 0.1) | |
1650 | g_stats.answers10_100++; | |
1651 | else if(spent < 1.0) | |
1652 | g_stats.answers100_1000++; | |
1653 | else | |
1654 | g_stats.answersSlow++; | |
1655 | ||
574af7ea | 1656 | uint64_t newLat=(uint64_t)(spent*1000000); |
b841314c | 1657 | newLat = min(newLat,(uint64_t)(((uint64_t) g_networkTimeoutMsec)*1000)); // outliers of several minutes exist.. |
08f3f638 | 1658 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + (float)newLat/g_latencyStatSize; |
0a6b1027 | 1659 | // no worries, we do this for packet cache hits elsewhere |
19178da9 | 1660 | |
1661 | auto ourtime = 1000.0*spent-sr.d_totUsec/1000.0; // in msec | |
1662 | if(ourtime < 1) | |
1663 | g_stats.ourtime0_1++; | |
1664 | else if(ourtime < 2) | |
1665 | g_stats.ourtime1_2++; | |
1666 | else if(ourtime < 4) | |
1667 | g_stats.ourtime2_4++; | |
1668 | else if(ourtime < 8) | |
1669 | g_stats.ourtime4_8++; | |
1670 | else if(ourtime < 16) | |
1671 | g_stats.ourtime8_16++; | |
1672 | else if(ourtime < 32) | |
1673 | g_stats.ourtime16_32++; | |
1674 | else { | |
1675 | // cerr<<"SLOW: "<<ourtime<<"ms -> "<<dc->d_mdp.d_qname<<"|"<<DNSRecordContent::NumberToType(dc->d_mdp.d_qtype)<<endl; | |
1676 | g_stats.ourtimeSlow++; | |
1677 | } | |
042da1a1 | 1678 | if(ourtime >= 0.0) { |
1679 | newLat=ourtime*1000; // usec | |
1680 | g_stats.avgLatencyOursUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyOursUsec + (float)newLat/g_latencyStatSize; | |
1681 | } | |
c6d04bdc | 1682 | // cout<<dc->d_mdp.d_qname<<"\t"<<MT->getUsec()<<"\t"<<sr.d_outqueries<<endl; |
288f4aa9 | 1683 | } |
3f81d239 | 1684 | catch(PDNSException &ae) { |
e6a9dde5 | 1685 | g_log<<Logger::Error<<"startDoResolve problem "<<makeLoginfo(dc)<<": "<<ae.reason<<endl; |
288f4aa9 | 1686 | } |
16ce7f18 JS |
1687 | catch(const MOADNSException &mde) { |
1688 | g_log<<Logger::Error<<"DNS parser error "<<makeLoginfo(dc) <<": "<<dc->d_mdp.d_qname<<", "<<mde.what()<<endl; | |
7b1469bb | 1689 | } |
fdbf35ac | 1690 | catch(std::exception& e) { |
e6a9dde5 | 1691 | g_log<<Logger::Error<<"STL error "<< makeLoginfo(dc)<<": "<<e.what(); |
068c7634 PD |
1692 | |
1693 | // Luawrapper nests the exception from Lua, so we unnest it here | |
1694 | try { | |
1695 | std::rethrow_if_nested(e); | |
2010ac95 | 1696 | } catch(const std::exception& ne) { |
e6a9dde5 | 1697 | g_log<<". Extra info: "<<ne.what(); |
068c7634 PD |
1698 | } catch(...) {} |
1699 | ||
e6a9dde5 | 1700 | g_log<<endl; |
c154c8a4 | 1701 | } |
288f4aa9 | 1702 | catch(...) { |
e6a9dde5 | 1703 | g_log<<Logger::Error<<"Any other exception in a resolver context "<< makeLoginfo(dc) <<endl; |
288f4aa9 | 1704 | } |
3ddb9247 | 1705 | |
ec6eacbc | 1706 | g_stats.maxMThreadStackUsage = max(MT->getMaxStackUsage(), g_stats.maxMThreadStackUsage); |
288f4aa9 BH |
1707 | } |
1708 | ||
d187038c | 1709 | static void makeControlChannelSocket(int processNum=-1) |
1d5b3ce6 | 1710 | { |
2d733c0f | 1711 | string sockname=::arg()["socket-dir"]+"/"+s_programname; |
677e2a46 | 1712 | if(processNum >= 0) |
335da0ba | 1713 | sockname += "."+std::to_string(processNum); |
677e2a46 | 1714 | sockname+=".controlsocket"; |
41f7a068 | 1715 | s_rcc.listen(sockname); |
3ddb9247 | 1716 | |
387de317 BH |
1717 | int sockowner = -1; |
1718 | int sockgroup = -1; | |
1719 | ||
1720 | if (!::arg().isEmpty("socket-group")) | |
1721 | sockgroup=::arg().asGid("socket-group"); | |
1722 | if (!::arg().isEmpty("socket-owner")) | |
1723 | sockowner=::arg().asUid("socket-owner"); | |
3ddb9247 | 1724 | |
f838ad8d BH |
1725 | if (sockgroup > -1 || sockowner > -1) { |
1726 | if(chown(sockname.c_str(), sockowner, sockgroup) < 0) { | |
1727 | unixDie("Failed to chown control socket"); | |
1728 | } | |
1729 | } | |
387de317 BH |
1730 | |
1731 | // do mode change if socket-mode is given | |
1732 | if(!::arg().isEmpty("socket-mode")) { | |
1733 | mode_t sockmode=::arg().asMode("socket-mode"); | |
34c513f9 RG |
1734 | if(chmod(sockname.c_str(), sockmode) < 0) { |
1735 | unixDie("Failed to chmod control socket"); | |
1736 | } | |
387de317 | 1737 | } |
1d5b3ce6 BH |
1738 | } |
1739 | ||
5cc8371b | 1740 | static void getQNameAndSubnet(const std::string& question, DNSName* dnsname, uint16_t* qtype, uint16_t* qclass, |
29e6303a | 1741 | bool& foundECS, EDNSSubnetOpts* ednssubnet, EDNSOptionViewMap* options, |
5cc8371b | 1742 | bool& foundXPF, ComboAddress* xpfSource, ComboAddress* xpfDest) |
02b47f43 | 1743 | { |
59cb4a79 | 1744 | const bool lookForXPF = xpfSource != nullptr && g_xpfRRCode != 0; |
5cc8371b RG |
1745 | const bool lookForECS = ednssubnet != nullptr; |
1746 | const struct dnsheader* dh = reinterpret_cast<const struct dnsheader*>(question.c_str()); | |
02b47f43 RG |
1747 | size_t questionLen = question.length(); |
1748 | unsigned int consumed=0; | |
1749 | *dnsname=DNSName(question.c_str(), questionLen, sizeof(dnsheader), false, qtype, qclass, &consumed); | |
1750 | ||
1751 | size_t pos= sizeof(dnsheader)+consumed+4; | |
5cc8371b RG |
1752 | const size_t headerSize = /* root */ 1 + sizeof(dnsrecordheader); |
1753 | const uint16_t arcount = ntohs(dh->arcount); | |
1754 | ||
1755 | for (uint16_t arpos = 0; arpos < arcount && questionLen > (pos + headerSize) && ((lookForECS && !foundECS) || (lookForXPF && !foundXPF)); arpos++) { | |
1756 | if (question.at(pos) != 0) { | |
1757 | /* not an OPT or a XPF, bye. */ | |
1758 | return; | |
1759 | } | |
1760 | ||
1761 | pos += 1; | |
1762 | const dnsrecordheader* drh = reinterpret_cast<const dnsrecordheader*>(&question.at(pos)); | |
1763 | pos += sizeof(dnsrecordheader); | |
1764 | ||
1765 | if (pos >= questionLen) { | |
1766 | return; | |
1767 | } | |
1768 | ||
02b47f43 | 1769 | /* OPT root label (1) followed by type (2) */ |
5cc8371b | 1770 | if(lookForECS && ntohs(drh->d_type) == QType::OPT) { |
00b8cadc RG |
1771 | if (!options) { |
1772 | char* ecsStart = nullptr; | |
1773 | size_t ecsLen = 0; | |
5cc8371b RG |
1774 | /* we need to pass the record len */ |
1775 | int res = getEDNSOption(const_cast<char*>(reinterpret_cast<const char*>(&question.at(pos - sizeof(drh->d_clen)))), questionLen - pos + sizeof(drh->d_clen), EDNSOptionCode::ECS, &ecsStart, &ecsLen); | |
00b8cadc RG |
1776 | if (res == 0 && ecsLen > 4) { |
1777 | EDNSSubnetOpts eso; | |
1778 | if(getEDNSSubnetOptsFromString(ecsStart + 4, ecsLen - 4, &eso)) { | |
1779 | *ednssubnet=eso; | |
5cc8371b | 1780 | foundECS = true; |
00b8cadc RG |
1781 | } |
1782 | } | |
1783 | } | |
1784 | else { | |
5cc8371b RG |
1785 | /* we need to pass the record len */ |
1786 | int res = getEDNSOptions(reinterpret_cast<const char*>(&question.at(pos -sizeof(drh->d_clen))), questionLen - pos + (sizeof(drh->d_clen)), *options); | |
00b8cadc RG |
1787 | if (res == 0) { |
1788 | const auto& it = options->find(EDNSOptionCode::ECS); | |
29e6303a | 1789 | if (it != options->end() && !it->second.values.empty() && it->second.values.at(0).content != nullptr && it->second.values.at(0).size > 0) { |
00b8cadc | 1790 | EDNSSubnetOpts eso; |
29e6303a | 1791 | if(getEDNSSubnetOptsFromString(it->second.values.at(0).content, it->second.values.at(0).size, &eso)) { |
00b8cadc | 1792 | *ednssubnet=eso; |
5cc8371b | 1793 | foundECS = true; |
00b8cadc RG |
1794 | } |
1795 | } | |
02b47f43 RG |
1796 | } |
1797 | } | |
1798 | } | |
59cb4a79 | 1799 | else if (lookForXPF && ntohs(drh->d_type) == g_xpfRRCode && ntohs(drh->d_class) == QClass::IN && drh->d_ttl == 0) { |
5cc8371b RG |
1800 | if ((questionLen - pos) < ntohs(drh->d_clen)) { |
1801 | return; | |
1802 | } | |
1803 | ||
1804 | foundXPF = parseXPFPayload(reinterpret_cast<const char*>(&question.at(pos)), ntohs(drh->d_clen), *xpfSource, xpfDest); | |
1805 | } | |
1806 | ||
1807 | pos += ntohs(drh->d_clen); | |
02b47f43 RG |
1808 | } |
1809 | } | |
1810 | ||
d187038c | 1811 | static void handleRunningTCPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 1812 | { |
cd989c87 | 1813 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(var); |
c038218b | 1814 | |
879b3f70 | 1815 | if(conn->state==TCPConnection::BYTE0) { |
2749c3fe | 1816 | ssize_t bytes=recv(conn->getFD(), &conn->data[0], 2, 0); |
09e6702a | 1817 | if(bytes==1) |
667f7e60 | 1818 | conn->state=TCPConnection::BYTE1; |
3ddb9247 | 1819 | if(bytes==2) { |
a0aa4f64 | 1820 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
2749c3fe | 1821 | conn->data.resize(conn->qlen); |
667f7e60 BH |
1822 | conn->bytesread=0; |
1823 | conn->state=TCPConnection::GETQUESTION; | |
09e6702a BH |
1824 | } |
1825 | if(!bytes || bytes < 0) { | |
bb4bdbaf | 1826 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1827 | return; |
1828 | } | |
1829 | } | |
667f7e60 | 1830 | else if(conn->state==TCPConnection::BYTE1) { |
2749c3fe | 1831 | ssize_t bytes=recv(conn->getFD(), &conn->data[1], 1, 0); |
09e6702a | 1832 | if(bytes==1) { |
667f7e60 | 1833 | conn->state=TCPConnection::GETQUESTION; |
a0aa4f64 | 1834 | conn->qlen=(((unsigned char)conn->data[0]) << 8)+ (unsigned char)conn->data[1]; |
2749c3fe | 1835 | conn->data.resize(conn->qlen); |
667f7e60 | 1836 | conn->bytesread=0; |
09e6702a BH |
1837 | } |
1838 | if(!bytes || bytes < 0) { | |
1839 | if(g_logCommonErrors) | |
e6a9dde5 | 1840 | g_log<<Logger::Error<<"TCP client "<< conn->d_remote.toStringWithPort() <<" disconnected after first byte"<<endl; |
bb4bdbaf | 1841 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1842 | return; |
1843 | } | |
1844 | } | |
667f7e60 | 1845 | else if(conn->state==TCPConnection::GETQUESTION) { |
2749c3fe | 1846 | ssize_t bytes=recv(conn->getFD(), &conn->data[conn->bytesread], conn->qlen - conn->bytesread, 0); |
f9d67b41 | 1847 | if(!bytes || bytes < 0 || bytes > std::numeric_limits<std::uint16_t>::max()) { |
c0f9be19 RG |
1848 | if(g_logCommonErrors) { |
1849 | g_log<<Logger::Error<<"TCP client "<< conn->d_remote.toStringWithPort() <<" disconnected while reading question body"<<endl; | |
1850 | } | |
bb4bdbaf | 1851 | t_fdm->removeReadFD(fd); |
09e6702a BH |
1852 | return; |
1853 | } | |
b841314c | 1854 | conn->bytesread+=(uint16_t)bytes; |
667f7e60 | 1855 | if(conn->bytesread==conn->qlen) { |
bb4bdbaf | 1856 | t_fdm->removeReadFD(fd); // should no longer awake ourselves when there is data to read |
879b3f70 | 1857 | |
9a864da4 | 1858 | std::unique_ptr<DNSComboWriter> dc; |
09e6702a | 1859 | try { |
9a864da4 | 1860 | dc=std::unique_ptr<DNSComboWriter>(new DNSComboWriter(conn->data, g_now)); |
09e6702a | 1861 | } |
16ce7f18 | 1862 | catch(const MOADNSException &mde) { |
3ddb9247 | 1863 | g_stats.clientParseError++; |
4957a608 | 1864 | if(g_logCommonErrors) |
e6a9dde5 | 1865 | g_log<<Logger::Error<<"Unable to parse packet from TCP client "<< conn->d_remote.toStringWithPort() <<endl; |
4957a608 | 1866 | return; |
09e6702a | 1867 | } |
cd989c87 BH |
1868 | dc->d_tcpConnection = conn; // carry the torch |
1869 | dc->setSocket(conn->getFD()); // this is the only time a copy is made of the actual fd | |
09e6702a | 1870 | dc->d_tcp=true; |
5cc8371b RG |
1871 | dc->setRemote(conn->d_remote); |
1872 | dc->setSource(conn->d_remote); | |
a6147cd2 | 1873 | ComboAddress dest; |
d38e2ba9 | 1874 | dest.reset(); |
a6147cd2 | 1875 | dest.sin4.sin_family = conn->d_remote.sin4.sin_family; |
1876 | socklen_t len = dest.getSocklen(); | |
1877 | getsockname(conn->getFD(), (sockaddr*)&dest, &len); // if this fails, we're ok with it | |
1878 | dc->setLocal(dest); | |
5cc8371b | 1879 | dc->setDestination(dest); |
33dcceba RG |
1880 | DNSName qname; |
1881 | uint16_t qtype=0; | |
1882 | uint16_t qclass=0; | |
1883 | bool needECS = false; | |
5cc8371b | 1884 | bool needXPF = g_XPFAcl.match(conn->d_remote); |
67e31ebe | 1885 | string requestorId; |
590388d2 | 1886 | string deviceId; |
16bbc6e3 | 1887 | bool logQuery = false; |
aa7929a3 | 1888 | #ifdef HAVE_PROTOBUF |
02b47f43 | 1889 | auto luaconfsLocal = g_luaconfs.getLocal(); |
63341e8d | 1890 | if (checkProtobufExport(luaconfsLocal)) { |
33dcceba RG |
1891 | needECS = true; |
1892 | } | |
b773359c | 1893 | logQuery = t_protobufServers && luaconfsLocal->protobufExportConfig.logQueries; |
33dcceba RG |
1894 | #endif |
1895 | ||
70fb28d9 | 1896 | if(needECS || needXPF || (t_pdl && (t_pdl->d_gettag_ffi || t_pdl->d_gettag))) { |
33dcceba RG |
1897 | |
1898 | try { | |
29e6303a | 1899 | EDNSOptionViewMap ednsOptions; |
5cc8371b | 1900 | bool xpfFound = false; |
b40562da | 1901 | dc->d_ecsParsed = true; |
5cc8371b | 1902 | dc->d_ecsFound = false; |
2749c3fe | 1903 | getQNameAndSubnet(conn->data, &qname, &qtype, &qclass, |
5cc8371b RG |
1904 | dc->d_ecsFound, &dc->d_ednssubnet, g_gettagNeedsEDNSOptions ? &ednsOptions : nullptr, |
1905 | xpfFound, needXPF ? &dc->d_source : nullptr, needXPF ? &dc->d_destination : nullptr); | |
02b47f43 | 1906 | |
70fb28d9 | 1907 | if(t_pdl) { |
33dcceba | 1908 | try { |
70fb28d9 | 1909 | if (t_pdl->d_gettag_ffi) { |
f1c7929a | 1910 | dc->d_tag = t_pdl->gettag_ffi(dc->d_source, dc->d_ednssubnet.source, dc->d_destination, qname, qtype, &dc->d_policyTags, dc->d_data, ednsOptions, true, requestorId, deviceId, dc->d_ttlCap, dc->d_variable, logQuery); |
70fb28d9 RG |
1911 | } |
1912 | else if (t_pdl->d_gettag) { | |
1913 | dc->d_tag = t_pdl->gettag(dc->d_source, dc->d_ednssubnet.source, dc->d_destination, qname, qtype, &dc->d_policyTags, dc->d_data, ednsOptions, true, requestorId, deviceId); | |
1914 | } | |
33dcceba | 1915 | } |
70fb28d9 | 1916 | catch(const std::exception& e) { |
33dcceba | 1917 | if(g_logCommonErrors) |
e6a9dde5 | 1918 | g_log<<Logger::Warning<<"Error parsing a query packet qname='"<<qname<<"' for tag determination, setting tag=0: "<<e.what()<<endl; |
33dcceba RG |
1919 | } |
1920 | } | |
1921 | } | |
70fb28d9 | 1922 | catch(const std::exception& e) |
33dcceba RG |
1923 | { |
1924 | if(g_logCommonErrors) | |
e6a9dde5 | 1925 | g_log<<Logger::Warning<<"Error parsing a query packet for tag determination, setting tag=0: "<<e.what()<<endl; |
33dcceba RG |
1926 | } |
1927 | } | |
f52177c3 RG |
1928 | |
1929 | const struct dnsheader* dh = reinterpret_cast<const struct dnsheader*>(&conn->data[0]); | |
1930 | ||
33dcceba | 1931 | #ifdef HAVE_PROTOBUF |
b773359c | 1932 | if(t_protobufServers || t_outgoingProtobufServers) { |
67e31ebe | 1933 | dc->d_requestorId = requestorId; |
590388d2 | 1934 | dc->d_deviceId = deviceId; |
02b47f43 | 1935 | dc->d_uuid = (*t_uuidGenerator)(); |
4898a348 | 1936 | } |
02b47f43 | 1937 | |
b773359c | 1938 | if(t_protobufServers) { |
02b47f43 | 1939 | try { |
02b47f43 | 1940 | |
845cbf4c | 1941 | if (logQuery && !(luaconfsLocal->protobufExportConfig.taggedOnly && dc->d_policyTags.empty())) { |
b773359c | 1942 | protobufLogQuery(luaconfsLocal->protobufMaskV4, luaconfsLocal->protobufMaskV6, dc->d_uuid, dc->d_source, dc->d_destination, dc->d_ednssubnet.source, true, dh->id, conn->qlen, qname, qtype, qclass, dc->d_policyTags, dc->d_requestorId, dc->d_deviceId); |
b790ef3d | 1943 | } |
02b47f43 RG |
1944 | } |
1945 | catch(std::exception& e) { | |
1946 | if(g_logCommonErrors) | |
e6a9dde5 | 1947 | g_log<<Logger::Warning<<"Error parsing a TCP query packet for edns subnet: "<<e.what()<<endl; |
02b47f43 RG |
1948 | } |
1949 | } | |
aa7929a3 | 1950 | #endif |
879b3f70 | 1951 | if(dc->d_mdp.d_header.qr) { |
048f5db6 | 1952 | g_stats.ignoredCount++; |
c0f9be19 RG |
1953 | if(g_logCommonErrors) { |
1954 | g_log<<Logger::Error<<"Ignoring answer from TCP client "<< dc->getRemote() <<" on server socket!"<<endl; | |
1955 | } | |
4957a608 | 1956 | return; |
879b3f70 | 1957 | } |
3abcdab2 | 1958 | if(dc->d_mdp.d_header.opcode) { |
048f5db6 | 1959 | g_stats.ignoredCount++; |
c0f9be19 RG |
1960 | if(g_logCommonErrors) { |
1961 | g_log<<Logger::Error<<"Ignoring non-query opcode from TCP client "<< dc->getRemote() <<" on server socket!"<<endl; | |
1962 | } | |
c0f9be19 RG |
1963 | return; |
1964 | } | |
1965 | else if (dh->qdcount == 0) { | |
1966 | g_stats.emptyQueriesCount++; | |
1967 | if(g_logCommonErrors) { | |
1968 | g_log<<Logger::Error<<"Ignoring empty (qdcount == 0) query from "<< dc->getRemote() <<" on server socket!"<<endl; | |
1969 | } | |
3abcdab2 PD |
1970 | return; |
1971 | } | |
09e6702a | 1972 | else { |
4957a608 BH |
1973 | ++g_stats.qcounter; |
1974 | ++g_stats.tcpqcounter; | |
9a864da4 | 1975 | MT->makeThread(startDoResolve, dc.release()); // deletes dc, will set state to BYTE0 again |
4957a608 | 1976 | return; |
09e6702a BH |
1977 | } |
1978 | } | |
1979 | } | |
1980 | } | |
1981 | ||
6dcd28c3 | 1982 | //! Handle new incoming TCP connection |
d187038c | 1983 | static void handleNewTCPQuestion(int fd, FDMultiplexer::funcparam_t& ) |
09e6702a | 1984 | { |
37d3f960 | 1985 | ComboAddress addr; |
09e6702a | 1986 | socklen_t addrlen=sizeof(addr); |
a683e8bd | 1987 | int newsock=accept(fd, (struct sockaddr*)&addr, &addrlen); |
b841314c | 1988 | if(newsock>=0) { |
85c32340 BH |
1989 | if(MT->numProcesses() > g_maxMThreads) { |
1990 | g_stats.overCapacityDrops++; | |
a7b68ae7 RG |
1991 | try { |
1992 | closesocket(newsock); | |
1993 | } | |
1994 | catch(const PDNSException& e) { | |
e6a9dde5 | 1995 | g_log<<Logger::Error<<"Error closing TCP socket after an over capacity drop: "<<e.reason<<endl; |
a7b68ae7 | 1996 | } |
85c32340 BH |
1997 | return; |
1998 | } | |
1999 | ||
92011b8f | 2000 | if(t_remotes) |
2001 | t_remotes->push_back(addr); | |
49a699c4 | 2002 | if(t_allowFrom && !t_allowFrom->match(&addr)) { |
3ddb9247 | 2003 | if(!g_quiet) |
e6a9dde5 | 2004 | g_log<<Logger::Error<<"["<<MT->getTid()<<"] dropping TCP query from "<<addr.toString()<<", address not matched by allow-from"<<endl; |
2914b022 | 2005 | |
09e6702a | 2006 | g_stats.unauthorizedTCP++; |
a7b68ae7 RG |
2007 | try { |
2008 | closesocket(newsock); | |
2009 | } | |
2010 | catch(const PDNSException& e) { | |
e6a9dde5 | 2011 | g_log<<Logger::Error<<"Error closing TCP socket after an ACL drop: "<<e.reason<<endl; |
a7b68ae7 | 2012 | } |
09e6702a BH |
2013 | return; |
2014 | } | |
bd0289fc | 2015 | if(g_maxTCPPerClient && t_tcpClientCounts->count(addr) && (*t_tcpClientCounts)[addr] >= g_maxTCPPerClient) { |
09e6702a | 2016 | g_stats.tcpClientOverflow++; |
a7b68ae7 RG |
2017 | try { |
2018 | closesocket(newsock); // don't call TCPConnection::closeAndCleanup here - did not enter it in the counts yet! | |
2019 | } | |
2020 | catch(const PDNSException& e) { | |
e6a9dde5 | 2021 | g_log<<Logger::Error<<"Error closing TCP socket after an overflow drop: "<<e.reason<<endl; |
a7b68ae7 | 2022 | } |
09e6702a BH |
2023 | return; |
2024 | } | |
3ddb9247 | 2025 | |
3897b9e1 | 2026 | setNonBlocking(newsock); |
f26bf547 | 2027 | std::shared_ptr<TCPConnection> tc = std::make_shared<TCPConnection>(newsock, addr); |
cd989c87 | 2028 | tc->state=TCPConnection::BYTE0; |
3ddb9247 | 2029 | |
cd989c87 | 2030 | t_fdm->addReadFD(tc->getFD(), handleRunningTCPQuestion, tc); |
c038218b | 2031 | |
0bff046b | 2032 | struct timeval now; |
c038218b | 2033 | Utility::gettimeofday(&now, 0); |
cd989c87 | 2034 | t_fdm->setReadTTD(tc->getFD(), now, g_tcpTimeout); |
09e6702a BH |
2035 | } |
2036 | } | |
3ddb9247 | 2037 | |
d187038c | 2038 | static string* doProcessUDPQuestion(const std::string& question, const ComboAddress& fromaddr, const ComboAddress& destaddr, struct timeval tv, int fd) |
1bc3c142 | 2039 | { |
183eb877 | 2040 | gettimeofday(&g_now, 0); |
b71b60ee | 2041 | struct timeval diff = g_now - tv; |
2042 | double delta=(diff.tv_sec*1000 + diff.tv_usec/1000.0); | |
183eb877 | 2043 | |
22cf1fda | 2044 | if(tv.tv_sec && delta > 1000.0) { |
b71b60ee | 2045 | g_stats.tooOldDrops++; |
2046 | return 0; | |
2047 | } | |
2048 | ||
1bc3c142 | 2049 | ++g_stats.qcounter; |
d7f10541 BH |
2050 | if(fromaddr.sin4.sin_family==AF_INET6) |
2051 | g_stats.ipv6qcounter++; | |
1bc3c142 BH |
2052 | |
2053 | string response; | |
93f0da94 | 2054 | const struct dnsheader* dh = (struct dnsheader*)question.c_str(); |
49a3500d | 2055 | unsigned int ctag=0; |
f57486f1 | 2056 | uint32_t qhash = 0; |
12aff2e5 | 2057 | bool needECS = false; |
5cc8371b | 2058 | bool needXPF = g_XPFAcl.match(fromaddr); |
02b47f43 | 2059 | std::vector<std::string> policyTags; |
5fd2577f | 2060 | LuaContext::LuaObject data; |
5cc8371b RG |
2061 | ComboAddress source = fromaddr; |
2062 | ComboAddress destination = destaddr; | |
67e31ebe | 2063 | string requestorId; |
590388d2 | 2064 | string deviceId; |
16bbc6e3 | 2065 | bool logQuery = false; |
12aff2e5 | 2066 | #ifdef HAVE_PROTOBUF |
02b47f43 | 2067 | boost::uuids::uuid uniqueId; |
02b47f43 | 2068 | auto luaconfsLocal = g_luaconfs.getLocal(); |
63341e8d | 2069 | if (checkProtobufExport(luaconfsLocal)) { |
4898a348 | 2070 | uniqueId = (*t_uuidGenerator)(); |
02b47f43 | 2071 | needECS = true; |
63341e8d | 2072 | } else if (checkOutgoingProtobufExport(luaconfsLocal)) { |
02b47f43 RG |
2073 | uniqueId = (*t_uuidGenerator)(); |
2074 | } | |
b773359c RG |
2075 | logQuery = t_protobufServers && luaconfsLocal->protobufExportConfig.logQueries; |
2076 | bool logResponse = t_protobufServers && luaconfsLocal->protobufExportConfig.logResponses; | |
12aff2e5 | 2077 | #endif |
b40562da RG |
2078 | EDNSSubnetOpts ednssubnet; |
2079 | bool ecsFound = false; | |
2080 | bool ecsParsed = false; | |
08b02366 RG |
2081 | uint16_t ecsBegin = 0; |
2082 | uint16_t ecsEnd = 0; | |
70fb28d9 RG |
2083 | uint32_t ttlCap = std::numeric_limits<uint32_t>::max(); |
2084 | bool variable = false; | |
1bc3c142 | 2085 | try { |
02b47f43 RG |
2086 | DNSName qname; |
2087 | uint16_t qtype=0; | |
2088 | uint16_t qclass=0; | |
1bc3c142 | 2089 | uint32_t age; |
c15ff3df | 2090 | bool qnameParsed=false; |
8f7473d7 | 2091 | #ifdef MALLOC_TRACE |
2092 | /* | |
2093 | static uint64_t last=0; | |
2094 | if(!last) | |
2095 | g_mtracer->clearAllocators(); | |
2096 | cout<<g_mtracer->getAllocs()-last<<" "<<g_mtracer->getNumOut()<<" -- BEGIN TRACE"<<endl; | |
2097 | last=g_mtracer->getAllocs(); | |
2098 | cout<<g_mtracer->topAllocatorsString()<<endl; | |
2099 | g_mtracer->clearAllocators(); | |
2100 | */ | |
2101 | #endif | |
55a1378f | 2102 | |
70fb28d9 | 2103 | if(needECS || needXPF || (t_pdl && (t_pdl->d_gettag || t_pdl->d_gettag_ffi))) { |
b2eacd67 | 2104 | try { |
29e6303a | 2105 | EDNSOptionViewMap ednsOptions; |
5cc8371b RG |
2106 | bool xpfFound = false; |
2107 | ||
2108 | ecsFound = false; | |
2109 | ||
2110 | getQNameAndSubnet(question, &qname, &qtype, &qclass, | |
2111 | ecsFound, &ednssubnet, g_gettagNeedsEDNSOptions ? &ednsOptions : nullptr, | |
2112 | xpfFound, needXPF ? &source : nullptr, needXPF ? &destination : nullptr); | |
2113 | ||
c15ff3df RG |
2114 | qnameParsed = true; |
2115 | ecsParsed = true; | |
12aff2e5 | 2116 | |
70fb28d9 | 2117 | if(t_pdl) { |
12aff2e5 | 2118 | try { |
70fb28d9 | 2119 | if (t_pdl->d_gettag_ffi) { |
f1c7929a | 2120 | ctag = t_pdl->gettag_ffi(source, ednssubnet.source, destination, qname, qtype, &policyTags, data, ednsOptions, false, requestorId, deviceId, ttlCap, variable, logQuery); |
70fb28d9 RG |
2121 | } |
2122 | else if (t_pdl->d_gettag) { | |
2123 | ctag = t_pdl->gettag(source, ednssubnet.source, destination, qname, qtype, &policyTags, data, ednsOptions, false, requestorId, deviceId); | |
2124 | } | |
12aff2e5 | 2125 | } |
70fb28d9 | 2126 | catch(const std::exception& e) { |
12aff2e5 | 2127 | if(g_logCommonErrors) |
e6a9dde5 | 2128 | g_log<<Logger::Warning<<"Error parsing a query packet qname='"<<qname<<"' for tag determination, setting tag=0: "<<e.what()<<endl; |
12aff2e5 | 2129 | } |
8ea8c302 | 2130 | } |
b2eacd67 | 2131 | } |
70fb28d9 | 2132 | catch(const std::exception& e) |
b2eacd67 | 2133 | { |
2134 | if(g_logCommonErrors) | |
e6a9dde5 | 2135 | g_log<<Logger::Warning<<"Error parsing a query packet for tag determination, setting tag=0: "<<e.what()<<endl; |
12aff2e5 | 2136 | } |
12ce523e | 2137 | } |
3ddb9247 | 2138 | |
02b47f43 | 2139 | bool cacheHit = false; |
1fbc6dc5 | 2140 | boost::optional<RecProtoBufMessage> pbMessage(boost::none); |
02b47f43 | 2141 | #ifdef HAVE_PROTOBUF |
b773359c | 2142 | if (t_protobufServers) { |
d362f7c1 | 2143 | pbMessage = RecProtoBufMessage(DNSProtoBufMessage::DNSProtoBufMessageType::Response); |
c165308b | 2144 | pbMessage->setServerIdentity(SyncRes::s_serverID); |
845cbf4c | 2145 | if (logQuery && !(luaconfsLocal->protobufExportConfig.taggedOnly && policyTags.empty())) { |
b773359c | 2146 | protobufLogQuery(luaconfsLocal->protobufMaskV4, luaconfsLocal->protobufMaskV6, uniqueId, source, destination, ednssubnet.source, false, dh->id, question.size(), qname, qtype, qclass, policyTags, requestorId, deviceId); |
b790ef3d | 2147 | } |
d9d3f9c1 RG |
2148 | } |
2149 | #endif /* HAVE_PROTOBUF */ | |
02b47f43 | 2150 | |
70fb28d9 RG |
2151 | /* It might seem like a good idea to skip the packet cache lookup if we know that the answer is not cacheable, |
2152 | but it means that the hash would not be computed. If some script decides at a later time to mark back the answer | |
2153 | as cacheable we would cache it with a wrong tag, so better safe than sorry. */ | |
8467ec26 | 2154 | vState valState; |
c15ff3df | 2155 | if (qnameParsed) { |
08b02366 | 2156 | cacheHit = (!SyncRes::s_nopacketcache && t_packetCache->getResponsePacket(ctag, question, qname, qtype, qclass, g_now.tv_sec, &response, &age, &valState, &qhash, &ecsBegin, &ecsEnd, pbMessage ? &(*pbMessage) : nullptr)); |
c15ff3df RG |
2157 | } |
2158 | else { | |
08b02366 | 2159 | cacheHit = (!SyncRes::s_nopacketcache && t_packetCache->getResponsePacket(ctag, question, qname, &qtype, &qclass, g_now.tv_sec, &response, &age, &valState, &qhash, &ecsBegin, &ecsEnd, pbMessage ? &(*pbMessage) : nullptr)); |
c15ff3df RG |
2160 | } |
2161 | ||
d9d3f9c1 | 2162 | if (cacheHit) { |
8467ec26 KM |
2163 | if(valState == Bogus) { |
2164 | if(t_bogusremotes) | |
2165 | t_bogusremotes->push_back(source); | |
2166 | if(t_bogusqueryring) | |
2167 | t_bogusqueryring->push_back(make_pair(qname, qtype)); | |
2168 | } | |
2169 | ||
d9d3f9c1 | 2170 | #ifdef HAVE_PROTOBUF |
b773359c | 2171 | if(t_protobufServers && logResponse && !(luaconfsLocal->protobufExportConfig.taggedOnly && pbMessage->getAppliedPolicy().empty() && pbMessage->getPolicyTags().empty())) { |
5cc8371b | 2172 | Netmask requestorNM(source, source.sin4.sin_family == AF_INET ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); |
e1c8a4bb | 2173 | const ComboAddress& requestor = requestorNM.getMaskedNetwork(); |
d362f7c1 RG |
2174 | pbMessage->update(uniqueId, &requestor, &destination, false, dh->id); |
2175 | pbMessage->setEDNSSubnet(ednssubnet.source, ednssubnet.source.isIpv4() ? luaconfsLocal->protobufMaskV4 : luaconfsLocal->protobufMaskV6); | |
2176 | pbMessage->setQueryTime(g_now.tv_sec, g_now.tv_usec); | |
2177 | pbMessage->setRequestorId(requestorId); | |
2178 | pbMessage->setDeviceId(deviceId); | |
b773359c | 2179 | protobufLogResponse(*pbMessage); |
02b47f43 | 2180 | } |
d9d3f9c1 | 2181 | #endif /* HAVE_PROTOBUF */ |
49a3500d | 2182 | if(!g_quiet) |
e6a9dde5 | 2183 | g_log<<Logger::Notice<<t_id<< " question answered from packet cache tag="<<ctag<<" from "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<endl; |
8f7473d7 | 2184 | |
1bc3c142 BH |
2185 | g_stats.packetCacheHits++; |
2186 | SyncRes::s_queries++; | |
2187 | ageDNSPacket(response, age); | |
b71b60ee | 2188 | struct msghdr msgh; |
2189 | struct iovec iov; | |
2190 | char cbuf[256]; | |
2191 | fillMSGHdr(&msgh, &iov, cbuf, 0, (char*)response.c_str(), response.length(), const_cast<ComboAddress*>(&fromaddr)); | |
2c0af54f PD |
2192 | msgh.msg_control=NULL; |
2193 | ||
cbc03320 | 2194 | if(g_fromtosockets.count(fd)) { |
fbe2a2e0 | 2195 | addCMsgSrcAddr(&msgh, cbuf, &destaddr, 0); |
b71b60ee | 2196 | } |
cbc03320 | 2197 | if(sendmsg(fd, &msgh, 0) < 0 && g_logCommonErrors) |
e6a9dde5 | 2198 | g_log<<Logger::Warning<<"Sending UDP reply to client "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<" failed with: "<<strerror(errno)<<endl; |
b71b60ee | 2199 | |
97bee66d | 2200 | if(response.length() >= sizeof(struct dnsheader)) { |
dd079764 RG |
2201 | struct dnsheader tmpdh; |
2202 | memcpy(&tmpdh, response.c_str(), sizeof(tmpdh)); | |
5cc8371b | 2203 | updateResponseStats(tmpdh.rcode, source, response.length(), 0, 0); |
97bee66d | 2204 | } |
08f3f638 | 2205 | g_stats.avgLatencyUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyUsec + 0.0; // we assume 0 usec |
19178da9 | 2206 | g_stats.avgLatencyOursUsec=(1-1.0/g_latencyStatSize)*g_stats.avgLatencyOursUsec + 0.0; // we assume 0 usec |
1bc3c142 BH |
2207 | return 0; |
2208 | } | |
3ddb9247 | 2209 | } |
1bc3c142 | 2210 | catch(std::exception& e) { |
e6a9dde5 | 2211 | g_log<<Logger::Error<<"Error processing or aging answer packet: "<<e.what()<<endl; |
1bc3c142 BH |
2212 | return 0; |
2213 | } | |
3ddb9247 | 2214 | |
f26bf547 | 2215 | if(t_pdl) { |
5cc8371b | 2216 | if(t_pdl->ipfilter(source, destination, *dh)) { |
4ea94941 | 2217 | if(!g_quiet) |
e6a9dde5 | 2218 | g_log<<Logger::Notice<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] DROPPED question from "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<" based on policy"<<endl; |
4ea94941 | 2219 | g_stats.policyDrops++; |
2220 | return 0; | |
2221 | } | |
2222 | } | |
2223 | ||
1bc3c142 | 2224 | if(MT->numProcesses() > g_maxMThreads) { |
461df9d2 | 2225 | if(!g_quiet) |
e6a9dde5 | 2226 | g_log<<Logger::Notice<<t_id<<" ["<<MT->getTid()<<"/"<<MT->numProcesses()<<"] DROPPED question from "<<source.toStringWithPort()<<(source != fromaddr ? " (via "+fromaddr.toStringWithPort()+")" : "")<<", over capacity"<<endl; |
461df9d2 | 2227 | |
1bc3c142 BH |
2228 | g_stats.overCapacityDrops++; |
2229 | return 0; | |
2230 | } | |
3ddb9247 | 2231 | |
9a864da4 | 2232 | auto dc = std::unique_ptr<DNSComboWriter>(new DNSComboWriter(question, g_now, std::move(policyTags), std::move(data))); |
1bc3c142 | 2233 | dc->setSocket(fd); |
49a3500d | 2234 | dc->d_tag=ctag; |
e9f63d47 | 2235 | dc->d_qhash=qhash; |
5cc8371b RG |
2236 | dc->setRemote(fromaddr); |
2237 | dc->setSource(source); | |
b71b60ee | 2238 | dc->setLocal(destaddr); |
5cc8371b | 2239 | dc->setDestination(destination); |
1bc3c142 | 2240 | dc->d_tcp=false; |
b40562da RG |
2241 | dc->d_ecsFound = ecsFound; |
2242 | dc->d_ecsParsed = ecsParsed; | |
08b02366 RG |
2243 | dc->d_ecsBegin = ecsBegin; |
2244 | dc->d_ecsEnd = ecsEnd; | |
b40562da | 2245 | dc->d_ednssubnet = ednssubnet; |
70fb28d9 RG |
2246 | dc->d_ttlCap = ttlCap; |
2247 | dc->d_variable = variable; | |
aa7929a3 | 2248 | #ifdef HAVE_PROTOBUF |
b773359c | 2249 | if (t_protobufServers || t_outgoingProtobufServers) { |
5164bac3 | 2250 | dc->d_uuid = std::move(uniqueId); |
d9d3f9c1 | 2251 | } |
67e31ebe | 2252 | dc->d_requestorId = requestorId; |
590388d2 | 2253 | dc->d_deviceId = deviceId; |
aa7929a3 RG |
2254 | #endif |
2255 | ||
9a864da4 | 2256 | MT->makeThread(startDoResolve, (void*) dc.release()); // deletes dc |
1bc3c142 | 2257 | return 0; |
3ddb9247 PD |
2258 | } |
2259 | ||
b71b60ee | 2260 | |
d187038c | 2261 | static void handleNewUDPQuestion(int fd, FDMultiplexer::funcparam_t& var) |
5db529f8 | 2262 | { |
a683e8bd | 2263 | ssize_t len; |
12c2f2b9 | 2264 | static const size_t maxIncomingQuerySize = 512; |
04896b99 | 2265 | static thread_local std::string data; |
5db529f8 | 2266 | ComboAddress fromaddr; |
b71b60ee | 2267 | struct msghdr msgh; |
2268 | struct iovec iov; | |
2269 | char cbuf[256]; | |
390f1dab | 2270 | bool firstQuery = true; |
b71b60ee | 2271 | |
c0a00acd RG |
2272 | for(size_t queriesCounter = 0; queriesCounter < s_maxUDPQueriesPerRound; queriesCounter++) { |
2273 | data.resize(maxIncomingQuerySize); | |
2274 | fromaddr.sin6.sin6_family=AF_INET6; // this makes sure fromaddr is big enough | |
2275 | fillMSGHdr(&msgh, &iov, cbuf, sizeof(cbuf), &data[0], data.size(), &fromaddr); | |
b71b60ee | 2276 | |
c0a00acd | 2277 | if((len=recvmsg(fd, &msgh, 0)) >= 0) { |
390f1dab | 2278 | |
c0a00acd | 2279 | firstQuery = false; |
390f1dab | 2280 | |
c0a00acd RG |
2281 | if (static_cast<size_t>(len) < sizeof(dnsheader)) { |
2282 | g_stats.ignoredCount++; | |
2283 | if (!g_quiet) { | |
2284 | g_log<<Logger::Error<<"Ignoring too-short ("<<std::to_string(len)<<") query from "<<fromaddr.toString()<<endl; | |
2285 | } | |
2286 | return; | |
04896b99 | 2287 | } |
04896b99 | 2288 | |
c0a00acd RG |
2289 | if (msgh.msg_flags & MSG_TRUNC) { |
2290 | g_stats.truncatedDrops++; | |
2291 | if (!g_quiet) { | |
2292 | g_log<<Logger::Error<<"Ignoring truncated query from "<<fromaddr.toString()<<endl; | |
2293 | } | |
2294 | return; | |
ba892c7f | 2295 | } |
b23b8614 | 2296 | |
c0a00acd RG |
2297 | if(t_remotes) { |
2298 | t_remotes->push_back(fromaddr); | |
2299 | } | |
81859ba5 | 2300 | |
c0a00acd RG |
2301 | if(t_allowFrom && !t_allowFrom->match(&fromaddr)) { |
2302 | if(!g_quiet) { | |
2303 | g_log<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toString()<<", address not matched by allow-from"<<endl; | |
2304 | } | |
3ddb9247 | 2305 | |
c0a00acd RG |
2306 | g_stats.unauthorizedUDP++; |
2307 | return; | |
5db529f8 | 2308 | } |
c0a00acd RG |
2309 | BOOST_STATIC_ASSERT(offsetof(sockaddr_in, sin_port) == offsetof(sockaddr_in6, sin6_port)); |
2310 | if(!fromaddr.sin4.sin_port) { // also works for IPv6 | |
2311 | if(!g_quiet) { | |
2312 | g_log<<Logger::Error<<"["<<MT->getTid()<<"] dropping UDP query from "<<fromaddr.toStringWithPort()<<", can't deal with port 0"<<endl; | |
2313 | } | |
2314 | ||
2315 | g_stats.clientParseError++; // not quite the best place to put it, but needs to go somewhere | |
2316 | return; | |
3abcdab2 | 2317 | } |
c0a00acd RG |
2318 | |
2319 | try { | |
2320 | data.resize(static_cast<size_t>(len)); | |
2321 | dnsheader* dh=(dnsheader*)&data[0]; | |
2322 | ||
2323 | if(dh->qr) { | |
2324 | g_stats.ignoredCount++; | |
2325 | if(g_logCommonErrors) { | |
2326 | g_log<<Logger::Error<<"Ignoring answer from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
2327 | } | |
2328 | } | |
2329 | else if(dh->opcode) { | |
2330 | g_stats.ignoredCount++; | |
2331 | if(g_logCommonErrors) { | |
2332 | g_log<<Logger::Error<<"Ignoring non-query opcode "<<dh->opcode<<" from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
2333 | } | |
a6147cd2 | 2334 | } |
c0f9be19 RG |
2335 | else if (dh->qdcount == 0) { |
2336 | g_stats.emptyQueriesCount++; | |
2337 | if(g_logCommonErrors) { | |
2338 | g_log<<Logger::Error<<"Ignoring empty (qdcount == 0) query from "<<fromaddr.toString()<<" on server socket!"<<endl; | |
2339 | } | |
2340 | } | |
a6147cd2 | 2341 | else { |
c0a00acd RG |
2342 | struct timeval tv={0,0}; |
2343 | HarvestTimestamp(&msgh, &tv); | |
2344 | ComboAddress dest; | |
2345 | dest.reset(); // this makes sure we ignore this address if not returned by recvmsg above | |
2346 | auto loc = rplookup(g_listenSocketsAddresses, fd); | |
2347 | if(HarvestDestinationAddress(&msgh, &dest)) { | |
2348 | // but.. need to get port too | |
2349 | if(loc) { | |
2350 | dest.sin4.sin_port = loc->sin4.sin_port; | |
2351 | } | |
a6147cd2 | 2352 | } |
2353 | else { | |
c0a00acd RG |
2354 | if(loc) { |
2355 | dest = *loc; | |
2356 | } | |
2357 | else { | |
2358 | dest.sin4.sin_family = fromaddr.sin4.sin_family; | |
2359 | socklen_t slen = dest.getSocklen(); | |
2360 | getsockname(fd, (sockaddr*)&dest, &slen); // if this fails, we're ok with it | |
2361 | } | |
2362 | } | |
2363 | ||
2364 | if(g_weDistributeQueries) { | |
2365 | distributeAsyncFunction(data, boost::bind(doProcessUDPQuestion, data, fromaddr, dest, tv, fd)); | |
2366 | } | |
2367 | else { | |
2368 | doProcessUDPQuestion(data, fromaddr, dest, tv, fd); | |
a6147cd2 | 2369 | } |
2370 | } | |
c0a00acd | 2371 | } |
16ce7f18 | 2372 | catch(const MOADNSException &mde) { |
c0a00acd RG |
2373 | g_stats.clientParseError++; |
2374 | if(g_logCommonErrors) { | |
2375 | g_log<<Logger::Error<<"Unable to parse packet from remote UDP client "<<fromaddr.toString() <<": "<<mde.what()<<endl; | |
2376 | } | |
2377 | } | |
2378 | catch(const std::runtime_error& e) { | |
2379 | g_stats.clientParseError++; | |
2380 | if(g_logCommonErrors) { | |
2381 | g_log<<Logger::Error<<"Unable to parse packet from remote UDP client "<<fromaddr.toString() <<": "<<e.what()<<endl; | |
2382 | } | |
5db529f8 BH |
2383 | } |
2384 | } | |
c0a00acd RG |
2385 | else { |
2386 | // cerr<<t_id<<" had error: "<<stringerror()<<endl; | |
2387 | if(firstQuery && errno == EAGAIN) { | |
2388 | g_stats.noPacketError++; | |
2389 | } | |
390f1dab | 2390 | |
c0a00acd RG |
2391 | break; |
2392 | } | |
ac0e821b | 2393 | } |
5db529f8 BH |
2394 | } |
2395 | ||
adb6cd72 | 2396 | static void makeTCPServerSockets(deferredAdd_t& deferredAdds, std::set<int>& tcpSockets) |
9c495589 | 2397 | { |
37d3f960 | 2398 | int fd; |
f28307ad | 2399 | vector<string>locals; |
2e3d8a19 | 2400 | stringtok(locals,::arg()["local-address"]," ,"); |
9c495589 | 2401 | |
f28307ad | 2402 | if(locals.empty()) |
3f81d239 | 2403 | throw PDNSException("No local address specified"); |
3ddb9247 | 2404 | |
f28307ad | 2405 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
2406 | ServiceTuple st; |
2407 | st.port=::arg().asNum("local-port"); | |
2408 | parseService(*i, st); | |
3ddb9247 | 2409 | |
32252594 BH |
2410 | ComboAddress sin; |
2411 | ||
d38e2ba9 | 2412 | sin.reset(); |
37d3f960 | 2413 | sin.sin4.sin_family = AF_INET; |
32252594 | 2414 | if(!IpToU32(st.host, (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 2415 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 2416 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3ddb9247 | 2417 | throw PDNSException("Unable to resolve local address for TCP server on '"+ st.host +"'"); |
37d3f960 BH |
2418 | } |
2419 | ||
2420 | fd=socket(sin.sin6.sin6_family, SOCK_STREAM, 0); | |
3ddb9247 | 2421 | if(fd<0) |
3f81d239 | 2422 | throw PDNSException("Making a TCP server socket for resolver: "+stringerror()); |
f28307ad | 2423 | |
3897b9e1 | 2424 | setCloseOnExec(fd); |
a903b39c | 2425 | |
f28307ad | 2426 | int tmp=1; |
810ff705 | 2427 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof tmp)<0) { |
e6a9dde5 | 2428 | g_log<<Logger::Error<<"Setsockopt failed for TCP listening socket"<<endl; |
c8ddb7c2 | 2429 | exit(1); |
f28307ad | 2430 | } |
0dfa94ab | 2431 | if(sin.sin6.sin6_family == AF_INET6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &tmp, sizeof(tmp)) < 0) { |
e6a9dde5 | 2432 | g_log<<Logger::Error<<"Failed to set IPv6 socket to IPv6 only, continuing anyhow: "<<strerror(errno)<<endl; |
0dfa94ab | 2433 | } |
2434 | ||
c8ddb7c2 | 2435 | #ifdef TCP_DEFER_ACCEPT |
38ac0821 | 2436 | if(setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &tmp, sizeof tmp) >= 0) { |
37d3f960 | 2437 | if(i==locals.begin()) |
377602e3 | 2438 | g_log<<Logger::Info<<"Enabled TCP data-ready filter for (slight) DoS protection"<<endl; |
c8ddb7c2 BH |
2439 | } |
2440 | #endif | |
2441 | ||
fec7dd5a SS |
2442 | if( ::arg().mustDo("non-local-bind") ) |
2443 | Utility::setBindAny(AF_INET, fd); | |
2444 | ||
2332f42d | 2445 | #ifdef SO_REUSEPORT |
810ff705 RG |
2446 | if(g_reusePort) { |
2447 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &tmp, sizeof(tmp)) < 0) | |
2332f42d | 2448 | throw PDNSException("SO_REUSEPORT: "+stringerror()); |
2449 | } | |
2450 | #endif | |
2451 | ||
0735b17e RG |
2452 | if (::arg().asNum("tcp-fast-open") > 0) { |
2453 | #ifdef TCP_FASTOPEN | |
2454 | int fastOpenQueueSize = ::arg().asNum("tcp-fast-open"); | |
2455 | if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &fastOpenQueueSize, sizeof fastOpenQueueSize) < 0) { | |
e6a9dde5 | 2456 | g_log<<Logger::Error<<"Failed to enable TCP Fast Open for listening socket: "<<strerror(errno)<<endl; |
0735b17e RG |
2457 | } |
2458 | #else | |
e6a9dde5 | 2459 | g_log<<Logger::Warning<<"TCP Fast Open configured but not supported for listening socket"<<endl; |
0735b17e RG |
2460 | #endif |
2461 | } | |
2462 | ||
32252594 | 2463 | sin.sin4.sin_port = htons(st.port); |
a683e8bd | 2464 | socklen_t socklen=sin.sin4.sin_family==AF_INET ? sizeof(sin.sin4) : sizeof(sin.sin6); |
3ddb9247 | 2465 | if (::bind(fd, (struct sockaddr *)&sin, socklen )<0) |
3f81d239 | 2466 | throw PDNSException("Binding TCP server socket for "+ st.host +": "+stringerror()); |
3ddb9247 | 2467 | |
3897b9e1 | 2468 | setNonBlocking(fd); |
49a699c4 | 2469 | setSocketSendBuffer(fd, 65000); |
37d3f960 | 2470 | listen(fd, 128); |
b243ca3b | 2471 | deferredAdds.push_back(make_pair(fd, handleNewTCPQuestion)); |
adb6cd72 RG |
2472 | tcpSockets.insert(fd); |
2473 | ||
84433b79 | 2474 | // we don't need to update g_listenSocketsAddresses since it doesn't work for TCP/IP: |
2475 | // - fd is not that which we know here, but returned from accept() | |
3ddb9247 | 2476 | if(sin.sin4.sin_family == AF_INET) |
377602e3 | 2477 | g_log<<Logger::Info<<"Listening for TCP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 2478 | else |
377602e3 | 2479 | g_log<<Logger::Info<<"Listening for TCP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 2480 | } |
9c495589 BH |
2481 | } |
2482 | ||
b243ca3b | 2483 | static void makeUDPServerSockets(deferredAdd_t& deferredAdds) |
288f4aa9 | 2484 | { |
fec7dd5a | 2485 | int one=1; |
f28307ad | 2486 | vector<string>locals; |
2e3d8a19 | 2487 | stringtok(locals,::arg()["local-address"]," ,"); |
288f4aa9 | 2488 | |
f28307ad | 2489 | if(locals.empty()) |
3f81d239 | 2490 | throw PDNSException("No local address specified"); |
3ddb9247 | 2491 | |
f28307ad | 2492 | for(vector<string>::const_iterator i=locals.begin();i!=locals.end();++i) { |
32252594 BH |
2493 | ServiceTuple st; |
2494 | st.port=::arg().asNum("local-port"); | |
2495 | parseService(*i, st); | |
2496 | ||
37d3f960 | 2497 | ComboAddress sin; |
996c89cc | 2498 | |
d38e2ba9 | 2499 | sin.reset(); |
37d3f960 | 2500 | sin.sin4.sin_family = AF_INET; |
32252594 | 2501 | if(!IpToU32(st.host.c_str() , (uint32_t*)&sin.sin4.sin_addr.s_addr)) { |
37d3f960 | 2502 | sin.sin6.sin6_family = AF_INET6; |
f71bc087 | 2503 | if(makeIPv6sockaddr(st.host, &sin.sin6) < 0) |
3ddb9247 | 2504 | throw PDNSException("Unable to resolve local address for UDP server on '"+ st.host +"'"); |
37d3f960 | 2505 | } |
3ddb9247 | 2506 | |
bb4bdbaf | 2507 | int fd=socket(sin.sin4.sin_family, SOCK_DGRAM, 0); |
d3b4137e | 2508 | if(fd < 0) { |
3f81d239 | 2509 | throw PDNSException("Making a UDP server socket for resolver: "+netstringerror()); |
d3b4137e | 2510 | } |
915b0c39 | 2511 | if (!setSocketTimestamps(fd)) |
e6a9dde5 | 2512 | g_log<<Logger::Warning<<"Unable to enable timestamp reporting for socket"<<endl; |
0dfa94ab | 2513 | |
b71b60ee | 2514 | if(IsAnyAddress(sin)) { |
cbc03320 | 2515 | if(sin.sin4.sin_family == AF_INET) |
2516 | if(!setsockopt(fd, IPPROTO_IP, GEN_IP_PKTINFO, &one, sizeof(one))) // linux supports this, so why not - might fail on other systems | |
2517 | g_fromtosockets.insert(fd); | |
757d3179 | 2518 | #ifdef IPV6_RECVPKTINFO |
cbc03320 | 2519 | if(sin.sin4.sin_family == AF_INET6) |
2520 | if(!setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one))) | |
2521 | g_fromtosockets.insert(fd); | |
757d3179 | 2522 | #endif |
0dfa94ab | 2523 | if(sin.sin6.sin6_family == AF_INET6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one)) < 0) { |
e6a9dde5 | 2524 | g_log<<Logger::Error<<"Failed to set IPv6 socket to IPv6 only, continuing anyhow: "<<strerror(errno)<<endl; |
0dfa94ab | 2525 | } |
b71b60ee | 2526 | } |
fec7dd5a SS |
2527 | if( ::arg().mustDo("non-local-bind") ) |
2528 | Utility::setBindAny(AF_INET6, fd); | |
2529 | ||
3897b9e1 | 2530 | setCloseOnExec(fd); |
a903b39c | 2531 | |
4e9a20e6 | 2532 | setSocketReceiveBuffer(fd, 250000); |
32252594 | 2533 | sin.sin4.sin_port = htons(st.port); |
37d3f960 | 2534 | |
2332f42d | 2535 | |
2573d4a6 | 2536 | #ifdef SO_REUSEPORT |
810ff705 | 2537 | if(g_reusePort) { |
2332f42d | 2538 | if(setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one)) < 0) |
2539 | throw PDNSException("SO_REUSEPORT: "+stringerror()); | |
2540 | } | |
2541 | #endif | |
a683e8bd | 2542 | socklen_t socklen=sin.getSocklen(); |
3ddb9247 | 2543 | if (::bind(fd, (struct sockaddr *)&sin, socklen)<0) |
335da0ba | 2544 | throw PDNSException("Resolver binding to server socket on port "+ std::to_string(st.port) +" for "+ st.host+": "+stringerror()); |
3ddb9247 | 2545 | |
3897b9e1 | 2546 | setNonBlocking(fd); |
c2136bf0 | 2547 | |
b243ca3b | 2548 | deferredAdds.push_back(make_pair(fd, handleNewUDPQuestion)); |
40a3dd64 | 2549 | g_listenSocketsAddresses[fd]=sin; // this is written to only from the startup thread, not from the workers |
3ddb9247 | 2550 | if(sin.sin4.sin_family == AF_INET) |
377602e3 | 2551 | g_log<<Logger::Info<<"Listening for UDP queries on "<< sin.toString() <<":"<<st.port<<endl; |
aa136564 | 2552 | else |
377602e3 | 2553 | g_log<<Logger::Info<<"Listening for UDP queries on ["<< sin.toString() <<"]:"<<st.port<<endl; |
f28307ad | 2554 | } |
c836dc19 | 2555 | } |
caa6eefa | 2556 | |
d187038c | 2557 | static void daemonize(void) |
c836dc19 BH |
2558 | { |
2559 | if(fork()) | |
2560 | exit(0); // bye bye | |
3ddb9247 PD |
2561 | |
2562 | setsid(); | |
c836dc19 | 2563 | |
27a5ead5 | 2564 | int i=open("/dev/null",O_RDWR); /* open stdin */ |
3ddb9247 | 2565 | if(i < 0) |
e6a9dde5 | 2566 | g_log<<Logger::Critical<<"Unable to open /dev/null: "<<stringerror()<<endl; |
27a5ead5 BH |
2567 | else { |
2568 | dup2(i,0); /* stdin */ | |
2569 | dup2(i,1); /* stderr */ | |
2570 | dup2(i,2); /* stderr */ | |
2571 | close(i); | |
2572 | } | |
288f4aa9 | 2573 | } |
caa6eefa | 2574 | |
d187038c | 2575 | static void usr1Handler(int) |
c75a6a9e BH |
2576 | { |
2577 | statsWanted=true; | |
2578 | } | |
ae1b2e98 | 2579 | |
d187038c | 2580 | static void usr2Handler(int) |
9170fbaf | 2581 | { |
f1f34cc2 | 2582 | g_quiet= !g_quiet; |
2583 | SyncRes::setDefaultLogMode(g_quiet ? SyncRes::LogNone : SyncRes::Log); | |
2584 | ::arg().set("quiet")=g_quiet ? "" : "no"; | |
9170fbaf BH |
2585 | } |
2586 | ||
d187038c | 2587 | static void doStats(void) |
c75a6a9e | 2588 | { |
16beeaa4 BH |
2589 | static time_t lastOutputTime; |
2590 | static uint64_t lastQueryCount; | |
d299d4f5 | 2591 | |
2592 | uint64_t cacheHits = broadcastAccFunction<uint64_t>(pleaseGetCacheHits); | |
2593 | uint64_t cacheMisses = broadcastAccFunction<uint64_t>(pleaseGetCacheMisses); | |
3ddb9247 | 2594 | |
d299d4f5 | 2595 | if(g_stats.qcounter && (cacheHits + cacheMisses) && SyncRes::s_queries && SyncRes::s_outqueries) { |
e6a9dde5 | 2596 | g_log<<Logger::Notice<<"stats: "<<g_stats.qcounter<<" questions, "<< |
3427fa8a BH |
2597 | broadcastAccFunction<uint64_t>(pleaseGetCacheSize)<< " cache entries, "<< |
2598 | broadcastAccFunction<uint64_t>(pleaseGetNegCacheSize)<<" negative entries, "<< | |
3ddb9247 PD |
2599 | (int)((cacheHits*100.0)/(cacheHits+cacheMisses))<<"% cache hits"<<endl; |
2600 | ||
e6a9dde5 | 2601 | g_log<<Logger::Notice<<"stats: throttle map: " |
3427fa8a | 2602 | << broadcastAccFunction<uint64_t>(pleaseGetThrottleSize) <<", ns speeds: " |
3ddb9247 | 2603 | << broadcastAccFunction<uint64_t>(pleaseGetNsSpeedsSize)<<endl; |
e6a9dde5 PL |
2604 | g_log<<Logger::Notice<<"stats: outpacket/query ratio "<<(int)(SyncRes::s_outqueries*100.0/SyncRes::s_queries)<<"%"; |
2605 | g_log<<Logger::Notice<<", "<<(int)(SyncRes::s_throttledqueries*100.0/(SyncRes::s_outqueries+SyncRes::s_throttledqueries))<<"% throttled, " | |
525b8a7c | 2606 | <<SyncRes::s_nodelegated<<" no-delegation drops"<<endl; |
e6a9dde5 | 2607 | g_log<<Logger::Notice<<"stats: "<<SyncRes::s_tcpoutqueries<<" outgoing tcp connections, "<< |
3427fa8a | 2608 | broadcastAccFunction<uint64_t>(pleaseGetConcurrentQueries)<<" queries running, "<<SyncRes::s_outgoingtimeouts<<" outgoing timeouts"<<endl; |
81883dcc | 2609 | |
e6a9dde5 | 2610 | //g_log<<Logger::Notice<<"stats: "<<g_stats.ednsPingMatches<<" ping matches, "<<g_stats.ednsPingMismatches<<" mismatches, "<< |
16beeaa4 | 2611 | //g_stats.noPingOutQueries<<" outqueries w/o ping, "<< g_stats.noEdnsOutQueries<<" w/o EDNS"<<endl; |
3ddb9247 | 2612 | |
e6a9dde5 | 2613 | g_log<<Logger::Notice<<"stats: " << broadcastAccFunction<uint64_t>(pleaseGetPacketCacheSize) << |
16beeaa4 | 2614 | " packet cache entries, "<<(int)(100.0*broadcastAccFunction<uint64_t>(pleaseGetPacketCacheHits)/SyncRes::s_queries) << "% packet cache hits"<<endl; |
3ddb9247 | 2615 | |
16beeaa4 BH |
2616 | time_t now = time(0); |
2617 | if(lastOutputTime && lastQueryCount && now != lastOutputTime) { | |
e6a9dde5 | 2618 | g_log<<Logger::Notice<<"stats: "<< (SyncRes::s_queries - lastQueryCount) / (now - lastOutputTime) <<" qps (average over "<< (now - lastOutputTime) << " seconds)"<<endl; |
16beeaa4 BH |
2619 | } |
2620 | lastOutputTime = now; | |
2621 | lastQueryCount = SyncRes::s_queries; | |
c75a6a9e | 2622 | } |
3ddb9247 | 2623 | else if(statsWanted) |
e6a9dde5 | 2624 | g_log<<Logger::Notice<<"stats: no stats yet!"<<endl; |
7becf07f | 2625 | |
c75a6a9e BH |
2626 | statsWanted=false; |
2627 | } | |
c836dc19 | 2628 | |
29f0b1ce | 2629 | static void houseKeeping(void *) |
c836dc19 | 2630 | { |
e4ae55e5 | 2631 | static thread_local time_t last_rootupdate, last_prune, last_secpoll, last_trustAnchorUpdate{0}; |
3337c2f7 RG |
2632 | static thread_local int cleanCounter=0; |
2633 | static thread_local bool s_running; // houseKeeping can get suspended in secpoll, and be restarted, which makes us do duplicate work | |
e4ae55e5 PL |
2634 | auto luaconfsLocal = g_luaconfs.getLocal(); |
2635 | ||
2636 | if (last_trustAnchorUpdate == 0 && !luaconfsLocal->trustAnchorFileInfo.fname.empty() && luaconfsLocal->trustAnchorFileInfo.interval != 0) { | |
2637 | // Loading the Lua config file already "refreshed" the TAs | |
2638 | last_trustAnchorUpdate = g_now.tv_sec + luaconfsLocal->trustAnchorFileInfo.interval * 3600; | |
2639 | } | |
2640 | ||
cc59bce6 | 2641 | try { |
2642 | if(s_running) | |
2643 | return; | |
2644 | s_running=true; | |
3ddb9247 | 2645 | |
cc59bce6 | 2646 | struct timeval now; |
2647 | Utility::gettimeofday(&now, 0); | |
3ddb9247 PD |
2648 | |
2649 | if(now.tv_sec - last_prune > (time_t)(5 + t_id)) { | |
cc59bce6 | 2650 | DTime dt; |
2651 | dt.setTimeval(now); | |
a6f7f5fe | 2652 | t_RC->doPrune(g_maxCacheEntries / g_numThreads); // this function is local to a thread, so fine anyhow |
2653 | t_packetCache->doPruneTo(g_maxPacketCacheEntries / g_numWorkerThreads); | |
3ddb9247 | 2654 | |
a6f7f5fe | 2655 | SyncRes::pruneNegCache(g_maxCacheEntries / (g_numWorkerThreads * 10)); |
3ddb9247 | 2656 | |
cc59bce6 | 2657 | if(!((cleanCounter++)%40)) { // this is a full scan! |
2658 | time_t limit=now.tv_sec-300; | |
a712cb56 | 2659 | SyncRes::pruneNSSpeeds(limit); |
cc59bce6 | 2660 | } |
2661 | last_prune=time(0); | |
d67620e4 | 2662 | } |
3ddb9247 | 2663 | |
cc59bce6 | 2664 | if(now.tv_sec - last_rootupdate > 7200) { |
30ee601a | 2665 | int res = SyncRes::getRootNS(g_now, nullptr); |
7836f7b4 PL |
2666 | if (!res) |
2667 | last_rootupdate=now.tv_sec; | |
cc59bce6 | 2668 | } |
3ddb9247 | 2669 | |
b243ca3b | 2670 | if(isHandlerThread()) { |
3ddb9247 | 2671 | |
cc59bce6 | 2672 | if(now.tv_sec - last_secpoll >= 3600) { |
2673 | try { | |
2674 | doSecPoll(&last_secpoll); | |
2675 | } | |
581d4ea3 | 2676 | catch(std::exception& e) |
2677 | { | |
e6a9dde5 | 2678 | g_log<<Logger::Error<<"Exception while performing security poll: "<<e.what()<<endl; |
581d4ea3 | 2679 | } |
47e9b74f | 2680 | catch(PDNSException& e) |
2681 | { | |
e6a9dde5 | 2682 | g_log<<Logger::Error<<"Exception while performing security poll: "<<e.reason<<endl; |
47e9b74f | 2683 | } |
d0992a65 CH |
2684 | catch(ImmediateServFailException &e) |
2685 | { | |
e6a9dde5 | 2686 | g_log<<Logger::Error<<"Exception while performing security poll: "<<e.reason<<endl; |
d0992a65 | 2687 | } |
47e9b74f | 2688 | catch(...) |
2689 | { | |
e6a9dde5 | 2690 | g_log<<Logger::Error<<"Exception while performing security poll"<<endl; |
47e9b74f | 2691 | } |
18b73338 | 2692 | } |
e4ae55e5 PL |
2693 | |
2694 | if (!luaconfsLocal->trustAnchorFileInfo.fname.empty() && luaconfsLocal->trustAnchorFileInfo.interval != 0 && | |
2695 | g_now.tv_sec - last_trustAnchorUpdate >= (luaconfsLocal->trustAnchorFileInfo.interval * 3600)) { | |
2696 | g_log<<Logger::Debug<<"Refreshing Trust Anchors from file"<<endl; | |
2697 | try { | |
2698 | map<DNSName, dsmap_t> dsAnchors; | |
2699 | if (updateTrustAnchorsFromFile(luaconfsLocal->trustAnchorFileInfo.fname, dsAnchors)) { | |
2700 | g_luaconfs.modify([&dsAnchors](LuaConfigItems& lci) { | |
2701 | lci.dsAnchors = dsAnchors; | |
2702 | }); | |
2703 | } | |
2704 | last_trustAnchorUpdate = now.tv_sec; | |
2705 | } catch (const PDNSException &pe) { | |
2706 | g_log<<Logger::Error<<"Unable to update Trust Anchors: "<<pe.reason<<endl; | |
2707 | } | |
2708 | } | |
2709 | s_running=false; | |
d67620e4 | 2710 | } |
2711 | } | |
cc59bce6 | 2712 | catch(PDNSException& ae) |
2713 | { | |
2714 | s_running=false; | |
e6a9dde5 | 2715 | g_log<<Logger::Error<<"Fatal error in housekeeping thread: "<<ae.reason<<endl; |
cc59bce6 | 2716 | throw; |
2717 | } | |
779828c4 | 2718 | } |
d6d5dea7 | 2719 | |
d187038c | 2720 | static void makeThreadPipes() |
49a699c4 | 2721 | { |
b243ca3b RG |
2722 | /* thread 0 is the handler / SNMP, we start at 1 */ |
2723 | for(unsigned int n = 1; n <= (g_numWorkerThreads + g_numDistributorThreads); ++n) { | |
2724 | auto& threadInfos = s_threadInfos.at(n); | |
2725 | ||
49a699c4 BH |
2726 | int fd[2]; |
2727 | if(pipe(fd) < 0) | |
2728 | unixDie("Creating pipe for inter-thread communications"); | |
3ddb9247 | 2729 | |
b243ca3b RG |
2730 | threadInfos.pipes.readToThread = fd[0]; |
2731 | threadInfos.pipes.writeToThread = fd[1]; | |
3ddb9247 | 2732 | |
49a699c4 BH |
2733 | if(pipe(fd) < 0) |
2734 | unixDie("Creating pipe for inter-thread communications"); | |
b243ca3b RG |
2735 | |
2736 | threadInfos.pipes.readFromThread = fd[0]; | |
2737 | threadInfos.pipes.writeFromThread = fd[1]; | |
3ddb9247 | 2738 | |
cf8cda18 RG |
2739 | if(pipe(fd) < 0) |
2740 | unixDie("Creating pipe for inter-thread communications"); | |
d10307c5 | 2741 | |
b243ca3b RG |
2742 | threadInfos.pipes.readQueriesToThread = fd[0]; |
2743 | threadInfos.pipes.writeQueriesToThread = fd[1]; | |
2744 | ||
2745 | if (!setNonBlocking(threadInfos.pipes.writeQueriesToThread)) { | |
d10307c5 RG |
2746 | unixDie("Making pipe for inter-thread communications non-blocking"); |
2747 | } | |
49a699c4 BH |
2748 | } |
2749 | } | |
2750 | ||
00c9b8c1 BH |
2751 | struct ThreadMSG |
2752 | { | |
2753 | pipefunc_t func; | |
2754 | bool wantAnswer; | |
2755 | }; | |
2756 | ||
b4e76a18 | 2757 | void broadcastFunction(const pipefunc_t& func) |
49a699c4 | 2758 | { |
b243ca3b RG |
2759 | /* This function might be called by the worker with t_id 0 during startup |
2760 | for the initialization of ACLs and domain maps. After that it should only | |
2761 | be called by the handler. */ | |
d77abca1 | 2762 | |
b243ca3b RG |
2763 | if (s_threadInfos.empty() && isHandlerThread()) { |
2764 | /* the handler and distributors will call themselves below, but | |
2765 | during startup we get called while s_threadInfos has not been | |
2766 | populated yet to update the ACL or domain maps, so we need to | |
2767 | handle that case. | |
2768 | */ | |
2769 | func(); | |
2770 | } | |
b4e76a18 | 2771 | |
b243ca3b RG |
2772 | unsigned int n = 0; |
2773 | for (const auto& threadInfo : s_threadInfos) { | |
49a699c4 | 2774 | if(n++ == t_id) { |
b4e76a18 | 2775 | func(); // don't write to ourselves! |
49a699c4 BH |
2776 | continue; |
2777 | } | |
3ddb9247 | 2778 | |
00c9b8c1 BH |
2779 | ThreadMSG* tmsg = new ThreadMSG(); |
2780 | tmsg->func = func; | |
2781 | tmsg->wantAnswer = true; | |
b243ca3b | 2782 | if(write(threadInfo.pipes.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { |
b841314c | 2783 | delete tmsg; |
b243ca3b | 2784 | |
49a699c4 | 2785 | unixDie("write to thread pipe returned wrong size or error"); |
b841314c | 2786 | } |
3ddb9247 | 2787 | |
49467864 | 2788 | string* resp = nullptr; |
b243ca3b | 2789 | if(read(threadInfo.pipes.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) |
49a699c4 | 2790 | unixDie("read from thread pipe returned wrong size or error"); |
3ddb9247 | 2791 | |
49a699c4 | 2792 | if(resp) { |
49a699c4 | 2793 | delete resp; |
49467864 | 2794 | resp = nullptr; |
49a699c4 BH |
2795 | } |
2796 | } | |
2797 | } | |
06ea9015 | 2798 | |
b243ca3b | 2799 | // This function is only called by the distributor threads, when pdns-distributes-queries is set |
8171ab83 | 2800 | void distributeAsyncFunction(const string& packet, const pipefunc_t& func) |
00c9b8c1 | 2801 | { |
b243ca3b | 2802 | if (!isDistributorThread()) { |
d77abca1 RG |
2803 | g_log<<Logger::Error<<"distributeAsyncFunction() has been called by a worker ("<<t_id<<")"<<endl; |
2804 | exit(1); | |
2805 | } | |
2806 | ||
8171ab83 | 2807 | unsigned int hash = hashQuestion(packet.c_str(), packet.length(), g_disthashseed); |
b243ca3b | 2808 | unsigned int target = /* skip handler */ 1 + g_numDistributorThreads + (hash % g_numWorkerThreads); |
06ea9015 | 2809 | |
b243ca3b RG |
2810 | const auto& targetInfo = s_threadInfos[target]; |
2811 | if(!targetInfo.isWorker) { | |
2812 | g_log<<Logger::Error<<"distributeAsyncFunction() tried to assign a query to a non-worker thread"<<endl; | |
d77abca1 | 2813 | exit(1); |
00c9b8c1 | 2814 | } |
d77abca1 | 2815 | |
b243ca3b | 2816 | const auto& tps = targetInfo.pipes; |
00c9b8c1 BH |
2817 | ThreadMSG* tmsg = new ThreadMSG(); |
2818 | tmsg->func = func; | |
2819 | tmsg->wantAnswer = false; | |
3ddb9247 | 2820 | |
cf8cda18 RG |
2821 | ssize_t written = write(tps.writeQueriesToThread, &tmsg, sizeof(tmsg)); |
2822 | if (written > 0) { | |
2823 | if (static_cast<size_t>(written) != sizeof(tmsg)) { | |
2824 | delete tmsg; | |
2825 | unixDie("write to thread pipe returned wrong size or error"); | |
2826 | } | |
2827 | } | |
2828 | else { | |
2829 | int error = errno; | |
b841314c | 2830 | delete tmsg; |
cf8cda18 RG |
2831 | if (error == EAGAIN || error == EWOULDBLOCK) { |
2832 | g_stats.queryPipeFullDrops++; | |
2833 | } else { | |
17634427 | 2834 | unixDie("write to thread pipe returned wrong size or error:" + std::to_string(error)); |
cf8cda18 | 2835 | } |
b841314c | 2836 | } |
00c9b8c1 | 2837 | } |
3427fa8a | 2838 | |
d187038c | 2839 | static void handlePipeRequest(int fd, FDMultiplexer::funcparam_t& var) |
49a699c4 | 2840 | { |
f26bf547 | 2841 | ThreadMSG* tmsg = nullptr; |
3ddb9247 | 2842 | |
cf8cda18 | 2843 | if(read(fd, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { // fd == readToThread || fd == readQueriesToThread |
49a699c4 BH |
2844 | unixDie("read from thread pipe returned wrong size or error"); |
2845 | } | |
3ddb9247 | 2846 | |
2f22827a | 2847 | void *resp=0; |
2848 | try { | |
2849 | resp = tmsg->func(); | |
2850 | } | |
2851 | catch(std::exception& e) { | |
6d2010a8 | 2852 | if(g_logCommonErrors) |
e6a9dde5 | 2853 | g_log<<Logger::Error<<"PIPE function we executed created exception: "<<e.what()<<endl; // but what if they wanted an answer.. we send 0 |
2f22827a | 2854 | } |
2855 | catch(PDNSException& e) { | |
6d2010a8 | 2856 | if(g_logCommonErrors) |
e6a9dde5 | 2857 | g_log<<Logger::Error<<"PIPE function we executed created PDNS exception: "<<e.reason<<endl; // but what if they wanted an answer.. we send 0 |
2f22827a | 2858 | } |
d7c676a5 | 2859 | if(tmsg->wantAnswer) { |
b243ca3b RG |
2860 | const auto& threadInfo = s_threadInfos.at(t_id); |
2861 | if(write(threadInfo.pipes.writeFromThread, &resp, sizeof(resp)) != sizeof(resp)) { | |
d7c676a5 | 2862 | delete tmsg; |
00c9b8c1 | 2863 | unixDie("write to thread pipe returned wrong size or error"); |
d7c676a5 RG |
2864 | } |
2865 | } | |
3ddb9247 | 2866 | |
00c9b8c1 | 2867 | delete tmsg; |
49a699c4 | 2868 | } |
09e6702a | 2869 | |
13034931 BH |
2870 | template<class T> void *voider(const boost::function<T*()>& func) |
2871 | { | |
2872 | return func(); | |
2873 | } | |
2874 | ||
b3b5459d BH |
2875 | vector<ComboAddress>& operator+=(vector<ComboAddress>&a, const vector<ComboAddress>& b) |
2876 | { | |
2877 | a.insert(a.end(), b.begin(), b.end()); | |
2878 | return a; | |
2879 | } | |
2880 | ||
92011b8f | 2881 | vector<pair<string, uint16_t> >& operator+=(vector<pair<string, uint16_t> >&a, const vector<pair<string, uint16_t> >& b) |
2882 | { | |
2883 | a.insert(a.end(), b.begin(), b.end()); | |
2884 | return a; | |
2885 | } | |
2886 | ||
3ddb9247 PD |
2887 | vector<pair<DNSName, uint16_t> >& operator+=(vector<pair<DNSName, uint16_t> >&a, const vector<pair<DNSName, uint16_t> >& b) |
2888 | { | |
2889 | a.insert(a.end(), b.begin(), b.end()); | |
2890 | return a; | |
2891 | } | |
2892 | ||
92011b8f | 2893 | |
387b9ca6 RG |
2894 | /* |
2895 | This function should only be called by the handler to gather metrics, wipe the cache, | |
788eeb4c RG |
2896 | reload the Lua script (not the Lua config) or change the current trace regex, |
2897 | and by the SNMP thread to gather metrics. */ | |
b4e76a18 | 2898 | template<class T> T broadcastAccFunction(const boost::function<T*()>& func) |
3427fa8a | 2899 | { |
b243ca3b | 2900 | if (!isHandlerThread()) { |
788eeb4c | 2901 | g_log<<Logger::Error<<"broadcastAccFunction has been called by a worker ("<<t_id<<")"<<endl; |
d77abca1 | 2902 | exit(1); |
d77abca1 RG |
2903 | } |
2904 | ||
b243ca3b | 2905 | unsigned int n = 0; |
3427fa8a | 2906 | T ret=T(); |
b243ca3b RG |
2907 | for (const auto& threadInfo : s_threadInfos) { |
2908 | if (n++ == t_id) { | |
2909 | continue; | |
2910 | } | |
2911 | ||
2912 | const auto& tps = threadInfo.pipes; | |
00c9b8c1 BH |
2913 | ThreadMSG* tmsg = new ThreadMSG(); |
2914 | tmsg->func = boost::bind(voider<T>, func); | |
2915 | tmsg->wantAnswer = true; | |
3ddb9247 | 2916 | |
b841314c RG |
2917 | if(write(tps.writeToThread, &tmsg, sizeof(tmsg)) != sizeof(tmsg)) { |
2918 | delete tmsg; | |
3427fa8a | 2919 | unixDie("write to thread pipe returned wrong size or error"); |
b841314c | 2920 | } |
3ddb9247 | 2921 | |
49467864 | 2922 | T* resp = nullptr; |
3427fa8a BH |
2923 | if(read(tps.readFromThread, &resp, sizeof(resp)) != sizeof(resp)) |
2924 | unixDie("read from thread pipe returned wrong size or error"); | |
3ddb9247 | 2925 | |
3427fa8a | 2926 | if(resp) { |
3427fa8a BH |
2927 | ret += *resp; |
2928 | delete resp; | |
49467864 | 2929 | resp = nullptr; |
3427fa8a BH |
2930 | } |
2931 | } | |
2932 | return ret; | |
2933 | } | |
2934 | ||
b4e76a18 RG |
2935 | template string broadcastAccFunction(const boost::function<string*()>& fun); // explicit instantiation |
2936 | template uint64_t broadcastAccFunction(const boost::function<uint64_t*()>& fun); // explicit instantiation | |
2937 | template vector<ComboAddress> broadcastAccFunction(const boost::function<vector<ComboAddress> *()>& fun); // explicit instantiation | |
2938 | template vector<pair<DNSName,uint16_t> > broadcastAccFunction(const boost::function<vector<pair<DNSName, uint16_t> > *()>& fun); // explicit instantiation | |
3427fa8a | 2939 | |
d187038c | 2940 | static void handleRCC(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a BH |
2941 | { |
2942 | string remote; | |
2943 | string msg=s_rcc.recv(&remote); | |
2944 | RecursorControlParser rcp; | |
2945 | RecursorControlParser::func_t* command; | |
3ddb9247 | 2946 | |
09e6702a | 2947 | string answer=rcp.getAnswer(msg, &command); |
f0f3f0b0 PL |
2948 | |
2949 | // If we are inside a chroot, we need to strip | |
2950 | if (!arg()["chroot"].empty()) { | |
a683e8bd | 2951 | size_t len = arg()["chroot"].length(); |
f0f3f0b0 PL |
2952 | remote = remote.substr(len); |
2953 | } | |
2954 | ||
ab5c053d BH |
2955 | try { |
2956 | s_rcc.send(answer, &remote); | |
2957 | command(); | |
2958 | } | |
fdbf35ac | 2959 | catch(std::exception& e) { |
e6a9dde5 | 2960 | g_log<<Logger::Error<<"Error dealing with control socket request: "<<e.what()<<endl; |
ab5c053d | 2961 | } |
3f81d239 | 2962 | catch(PDNSException& ae) { |
e6a9dde5 | 2963 | g_log<<Logger::Error<<"Error dealing with control socket request: "<<ae.reason<<endl; |
ab5c053d | 2964 | } |
09e6702a BH |
2965 | } |
2966 | ||
d187038c | 2967 | static void handleTCPClientReadable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 2968 | { |
0b18b22e | 2969 | PacketID* pident=any_cast<PacketID>(&var); |
667f7e60 | 2970 | // cerr<<"handleTCPClientReadable called for fd "<<fd<<", pident->inNeeded: "<<pident->inNeeded<<", "<<pident->sock->getHandle()<<endl; |
09e6702a | 2971 | |
667f7e60 | 2972 | shared_array<char> buffer(new char[pident->inNeeded]); |
09e6702a | 2973 | |
a683e8bd | 2974 | ssize_t ret=recv(fd, buffer.get(), pident->inNeeded,0); |
09e6702a | 2975 | if(ret > 0) { |
667f7e60 | 2976 | pident->inMSG.append(&buffer[0], &buffer[ret]); |
a683e8bd | 2977 | pident->inNeeded-=(size_t)ret; |
825fa717 | 2978 | if(!pident->inNeeded || pident->inIncompleteOkay) { |
667f7e60 BH |
2979 | // cerr<<"Got entire load of "<<pident->inMSG.size()<<" bytes"<<endl; |
2980 | PacketID pid=*pident; | |
2981 | string msg=pident->inMSG; | |
3ddb9247 | 2982 | |
bb4bdbaf | 2983 | t_fdm->removeReadFD(fd); |
3ddb9247 | 2984 | MT->sendEvent(pid, &msg); |
09e6702a BH |
2985 | } |
2986 | else { | |
667f7e60 | 2987 | // cerr<<"Still have "<<pident->inNeeded<<" left to go"<<endl; |
09e6702a BH |
2988 | } |
2989 | } | |
2990 | else { | |
667f7e60 | 2991 | PacketID tmp=*pident; |
bb4bdbaf | 2992 | t_fdm->removeReadFD(fd); // pident might now be invalid (it isn't, but still) |
09e6702a BH |
2993 | string empty; |
2994 | MT->sendEvent(tmp, &empty); // this conveys error status | |
2995 | } | |
2996 | } | |
2997 | ||
d187038c | 2998 | static void handleTCPClientWritable(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 2999 | { |
0b18b22e | 3000 | PacketID* pid=any_cast<PacketID>(&var); |
a683e8bd | 3001 | ssize_t ret=send(fd, pid->outMSG.c_str() + pid->outPos, pid->outMSG.size() - pid->outPos,0); |
09e6702a | 3002 | if(ret > 0) { |
a683e8bd | 3003 | pid->outPos+=(ssize_t)ret; |
667f7e60 BH |
3004 | if(pid->outPos==pid->outMSG.size()) { |
3005 | PacketID tmp=*pid; | |
bb4bdbaf | 3006 | t_fdm->removeWriteFD(fd); |
09e6702a BH |
3007 | MT->sendEvent(tmp, &tmp.outMSG); // send back what we sent to convey everything is ok |
3008 | } | |
3009 | } | |
3010 | else { // error or EOF | |
667f7e60 | 3011 | PacketID tmp(*pid); |
bb4bdbaf | 3012 | t_fdm->removeWriteFD(fd); |
09e6702a | 3013 | string sent; |
998a4334 | 3014 | MT->sendEvent(tmp, &sent); // we convey error status by sending empty string |
09e6702a BH |
3015 | } |
3016 | } | |
3017 | ||
34801ab1 | 3018 | // resend event to everybody chained onto it |
d187038c | 3019 | static void doResends(MT_t::waiters_t::iterator& iter, PacketID resend, const string& content) |
34801ab1 BH |
3020 | { |
3021 | if(iter->key.chain.empty()) | |
3022 | return; | |
e27e91a8 | 3023 | // cerr<<"doResends called!\n"; |
34801ab1 BH |
3024 | for(PacketID::chain_t::iterator i=iter->key.chain.begin(); i != iter->key.chain.end() ; ++i) { |
3025 | resend.fd=-1; | |
3026 | resend.id=*i; | |
e27e91a8 | 3027 | // cerr<<"\tResending "<<content.size()<<" bytes for fd="<<resend.fd<<" and id="<<resend.id<<endl; |
4665c31e | 3028 | |
34801ab1 BH |
3029 | MT->sendEvent(resend, &content); |
3030 | g_stats.chainResends++; | |
34801ab1 BH |
3031 | } |
3032 | } | |
3033 | ||
d187038c | 3034 | static void handleUDPServerResponse(int fd, FDMultiplexer::funcparam_t& var) |
09e6702a | 3035 | { |
600fc20b | 3036 | PacketID pid=any_cast<PacketID>(var); |
a683e8bd | 3037 | ssize_t len; |
fae8fe07 RG |
3038 | std::string packet; |
3039 | packet.resize(g_outgoingEDNSBufsize); | |
996c89cc | 3040 | ComboAddress fromaddr; |
09e6702a BH |
3041 | socklen_t addrlen=sizeof(fromaddr); |
3042 | ||
fae8fe07 | 3043 | len=recvfrom(fd, &packet.at(0), packet.size(), 0, (sockaddr *)&fromaddr, &addrlen); |
c1da7976 | 3044 | |
a683e8bd | 3045 | if(len < (ssize_t) sizeof(dnsheader)) { |
998a4334 | 3046 | if(len < 0) |
996c89cc | 3047 | ; // cerr<<"Error on fd "<<fd<<": "<<stringerror()<<"\n"; |
09e6702a | 3048 | else { |
3ddb9247 | 3049 | g_stats.serverParseError++; |
09e6702a | 3050 | if(g_logCommonErrors) |
e6a9dde5 | 3051 | g_log<<Logger::Error<<"Unable to parse packet from remote UDP server "<< fromaddr.toString() << |
e44d9fa7 | 3052 | ": packet smaller than DNS header"<<endl; |
998a4334 | 3053 | } |
34801ab1 | 3054 | |
49a699c4 | 3055 | t_udpclientsocks->returnSocket(fd); |
34801ab1 BH |
3056 | string empty; |
3057 | ||
3058 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pid); | |
3ddb9247 | 3059 | if(iter != MT->d_waiters.end()) |
34801ab1 | 3060 | doResends(iter, pid, empty); |
3ddb9247 | 3061 | |
34801ab1 | 3062 | MT->sendEvent(pid, &empty); // this denotes error (does lookup again.. at least L1 will be hot) |
998a4334 | 3063 | return; |
3ddb9247 | 3064 | } |
998a4334 | 3065 | |
fae8fe07 | 3066 | packet.resize(len); |
998a4334 | 3067 | dnsheader dh; |
fae8fe07 | 3068 | memcpy(&dh, &packet.at(0), sizeof(dh)); |
3ddb9247 | 3069 | |
6da3b3ad PD |
3070 | PacketID pident; |
3071 | pident.remote=fromaddr; | |
3072 | pident.id=dh.id; | |
3073 | pident.fd=fd; | |
34801ab1 | 3074 | |
33a928af | 3075 | if(!dh.qr && g_logCommonErrors) { |
e6a9dde5 | 3076 | g_log<<Logger::Notice<<"Not taking data from question on outgoing socket from "<< fromaddr.toStringWithPort() <<endl; |
6da3b3ad PD |
3077 | } |
3078 | ||
3079 | if(!dh.qdcount || // UPC, Nominum, very old BIND on FormErr, NSD | |
3080 | !dh.qr) { // one weird server | |
3081 | pident.domain.clear(); | |
3082 | pident.type = 0; | |
3083 | } | |
3084 | else { | |
3085 | try { | |
0b31e67e | 3086 | if(len > 12) |
fae8fe07 | 3087 | pident.domain=DNSName(&packet.at(0), len, 12, false, &pident.type); // don't copy this from above - we need to do the actual read |
6da3b3ad PD |
3088 | } |
3089 | catch(std::exception& e) { | |
3090 | g_stats.serverParseError++; // won't be fed to lwres.cc, so we have to increment | |
e6a9dde5 | 3091 | g_log<<Logger::Warning<<"Error in packet from remote nameserver "<< fromaddr.toStringWithPort() << ": "<<e.what() << endl; |
6da3b3ad | 3092 | return; |
34801ab1 | 3093 | } |
6da3b3ad | 3094 | } |
34801ab1 | 3095 | |
6da3b3ad PD |
3096 | MT_t::waiters_t::iterator iter=MT->d_waiters.find(pident); |
3097 | if(iter != MT->d_waiters.end()) { | |
3098 | doResends(iter, pident, packet); | |
3099 | } | |
c1da7976 | 3100 | |
6da3b3ad | 3101 | retryWithName: |
4957a608 | 3102 | |
6da3b3ad PD |
3103 | if(!MT->sendEvent(pident, &packet)) { |
3104 | // we do a full scan for outstanding queries on unexpected answers. not too bad since we only accept them on the right port number, which is hard enough to guess | |
3105 | for(MT_t::waiters_t::iterator mthread=MT->d_waiters.begin(); mthread!=MT->d_waiters.end(); ++mthread) { | |
3106 | if(pident.fd==mthread->key.fd && mthread->key.remote==pident.remote && mthread->key.type == pident.type && | |
e325f20c | 3107 | pident.domain == mthread->key.domain) { |
6da3b3ad | 3108 | mthread->key.nearMisses++; |
998a4334 | 3109 | } |
6da3b3ad PD |
3110 | |
3111 | // be a bit paranoid here since we're weakening our matching | |
3ddb9247 | 3112 | if(pident.domain.empty() && !mthread->key.domain.empty() && !pident.type && mthread->key.type && |
6da3b3ad PD |
3113 | pident.id == mthread->key.id && mthread->key.remote == pident.remote) { |
3114 | // cerr<<"Empty response, rest matches though, sending to a waiter"<<endl; | |
3115 | pident.domain = mthread->key.domain; | |
3116 | pident.type = mthread->key.type; | |
3117 | goto retryWithName; // note that this only passes on an error, lwres will still reject the packet | |
d4fb76e9 | 3118 | } |
09e6702a | 3119 | } |
6da3b3ad PD |
3120 | g_stats.unexpectedCount++; // if we made it here, it really is an unexpected answer |
3121 | if(g_logCommonErrors) { | |
e6a9dde5 | 3122 | g_log<<Logger::Warning<<"Discarding unexpected packet from "<<fromaddr.toStringWithPort()<<": "<< (pident.domain.empty() ? "<empty>" : pident.domain.toString())<<", "<<pident.type<<", "<<MT->d_waiters.size()<<" waiters"<<endl; |
d8f6d49f | 3123 | } |
09e6702a | 3124 | } |
6da3b3ad PD |
3125 | else if(fd >= 0) { |
3126 | t_udpclientsocks->returnSocket(fd); | |
3127 | } | |
09e6702a BH |
3128 | } |
3129 | ||
1f4abb20 BH |
3130 | FDMultiplexer* getMultiplexer() |
3131 | { | |
3132 | FDMultiplexer* ret; | |
f26bf547 | 3133 | for(const auto& i : FDMultiplexer::getMultiplexerMap()) { |
1f4abb20 | 3134 | try { |
f26bf547 | 3135 | ret=i.second(); |
1f4abb20 BH |
3136 | return ret; |
3137 | } | |
98d0ee4a | 3138 | catch(FDMultiplexerException &fe) { |
e6a9dde5 | 3139 | g_log<<Logger::Error<<"Non-fatal error initializing possible multiplexer ("<<fe.what()<<"), falling back"<<endl; |
98d0ee4a BH |
3140 | } |
3141 | catch(...) { | |
e6a9dde5 | 3142 | g_log<<Logger::Error<<"Non-fatal error initializing possible multiplexer"<<endl; |
98d0ee4a | 3143 | } |
1f4abb20 | 3144 | } |
e6a9dde5 | 3145 | g_log<<Logger::Error<<"No working multiplexer found!"<<endl; |
1f4abb20 BH |
3146 | exit(1); |
3147 | } | |
3148 | ||
3ddb9247 | 3149 | |
d187038c | 3150 | static string* doReloadLuaScript() |
4485aa35 | 3151 | { |
674cf0f6 | 3152 | string fname= ::arg()["lua-dns-script"]; |
4485aa35 | 3153 | try { |
674cf0f6 | 3154 | if(fname.empty()) { |
f26bf547 | 3155 | t_pdl.reset(); |
377602e3 | 3156 | g_log<<Logger::Info<<t_id<<" Unloaded current lua script"<<endl; |
0f39c1a3 | 3157 | return new string("unloaded\n"); |
4485aa35 BH |
3158 | } |
3159 | else { | |
9694e14f AT |
3160 | t_pdl = std::make_shared<RecursorLua4>(); |
3161 | t_pdl->loadFile(fname); | |
4485aa35 BH |
3162 | } |
3163 | } | |
fdbf35ac | 3164 | catch(std::exception& e) { |
e6a9dde5 | 3165 | g_log<<Logger::Error<<t_id<<" Retaining current script, error from '"<<fname<<"': "<< e.what() <<endl; |
0f39c1a3 | 3166 | return new string("retaining current script, error from '"+fname+"': "+e.what()+"\n"); |
4485aa35 | 3167 | } |
3ddb9247 | 3168 | |
e6a9dde5 | 3169 | g_log<<Logger::Warning<<t_id<<" (Re)loaded lua script from '"<<fname<<"'"<<endl; |
0f39c1a3 | 3170 | return new string("(re)loaded '"+fname+"'\n"); |
4485aa35 BH |
3171 | } |
3172 | ||
49a699c4 BH |
3173 | string doQueueReloadLuaScript(vector<string>::const_iterator begin, vector<string>::const_iterator end) |
3174 | { | |
3ddb9247 | 3175 | if(begin != end) |
49a699c4 | 3176 | ::arg().set("lua-dns-script") = *begin; |
3ddb9247 | 3177 | |
0f39c1a3 | 3178 | return broadcastAccFunction<string>(doReloadLuaScript); |
3ddb9247 | 3179 | } |
49a699c4 | 3180 | |
d187038c | 3181 | static string* pleaseUseNewTraceRegex(const std::string& newRegex) |
77499b05 BH |
3182 | try |
3183 | { | |
3184 | if(newRegex.empty()) { | |
f26bf547 | 3185 | t_traceRegex.reset(); |
77499b05 BH |
3186 | return new string("unset\n"); |
3187 | } | |
3188 | else { | |
f26bf547 | 3189 | t_traceRegex = std::make_shared<Regex>(newRegex); |
77499b05 BH |
3190 | return new string("ok\n"); |
3191 | } | |
3192 | } | |
3f81d239 | 3193 | catch(PDNSException& ae) |
77499b05 BH |
3194 | { |
3195 | return new string(ae.reason+"\n"); | |
3196 | } | |
3197 | ||
3198 | string doTraceRegex(vector<string>::const_iterator begin, vector<string>::const_iterator end) | |
3199 | { | |
3200 | return broadcastAccFunction<string>(boost::bind(pleaseUseNewTraceRegex, begin!=end ? *begin : "")); | |
3201 | } | |
3202 | ||
4e9a20e6 | 3203 | static void checkLinuxIPv6Limits() |
3204 | { | |
3205 | #ifdef __linux__ | |
3206 | string line; | |
3207 | if(readFileIfThere("/proc/sys/net/ipv6/route/max_size", &line)) { | |
335da0ba | 3208 | int lim=std::stoi(line); |
4e9a20e6 | 3209 | if(lim < 16384) { |
e6a9dde5 | 3210 | g_log<<Logger::Error<<"If using IPv6, please raise sysctl net.ipv6.route.max_size, currently set to "<<lim<<" which is < 16384"<<endl; |
4e9a20e6 | 3211 | } |
3212 | } | |
3213 | #endif | |
3214 | } | |
36849ff2 | 3215 | static void checkOrFixFDS() |
4e9a20e6 | 3216 | { |
c0063e60 | 3217 | unsigned int availFDs=getFilenumLimit(); |
3218 | unsigned int wantFDs = g_maxMThreads * g_numWorkerThreads +25; // even healthier margin then before | |
3219 | ||
3220 | if(wantFDs > availFDs) { | |
067ad20e | 3221 | unsigned int hardlimit= getFilenumLimit(true); |
3222 | if(hardlimit >= wantFDs) { | |
c0063e60 | 3223 | setFilenumLimit(wantFDs); |
e6a9dde5 | 3224 | g_log<<Logger::Warning<<"Raised soft limit on number of filedescriptors to "<<wantFDs<<" to match max-mthreads and threads settings"<<endl; |
36849ff2 | 3225 | } |
3226 | else { | |
067ad20e | 3227 | int newval = (hardlimit - 25) / g_numWorkerThreads; |
e6a9dde5 | 3228 | g_log<<Logger::Warning<<"Insufficient number of filedescriptors available for max-mthreads*threads setting! ("<<hardlimit<<" < "<<wantFDs<<"), reducing max-mthreads to "<<newval<<endl; |
36849ff2 | 3229 | g_maxMThreads = newval; |
067ad20e | 3230 | setFilenumLimit(hardlimit); |
36849ff2 | 3231 | } |
3232 | } | |
4e9a20e6 | 3233 | } |
77499b05 | 3234 | |
c390b2da | 3235 | static void* recursorThread(unsigned int tid, const string& threadName); |
51e2144e | 3236 | |
f26bf547 | 3237 | static void* pleaseSupplantACLs(std::shared_ptr<NetmaskGroup> ng) |
49a699c4 BH |
3238 | { |
3239 | t_allowFrom = ng; | |
f26bf547 | 3240 | return nullptr; |
49a699c4 BH |
3241 | } |
3242 | ||
dbd23fc2 BH |
3243 | int g_argc; |
3244 | char** g_argv; | |
3245 | ||
18af64a8 | 3246 | void parseACLs() |
f7c1d4e3 | 3247 | { |
18af64a8 | 3248 | static bool l_initialized; |
3ddb9247 | 3249 | |
49a699c4 | 3250 | if(l_initialized) { // only reload configuration file on second call |
18af64a8 | 3251 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
3e63da83 JR |
3252 | if(::arg()["config-name"]!="") { |
3253 | configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf"; | |
3254 | } | |
18af64a8 | 3255 | cleanSlashes(configname); |
3ddb9247 PD |
3256 | |
3257 | if(!::arg().preParseFile(configname.c_str(), "allow-from-file")) | |
7e818521 | 3258 | throw runtime_error("Unable to re-parse configuration file '"+configname+"'"); |
49a699c4 | 3259 | ::arg().preParseFile(configname.c_str(), "allow-from", LOCAL_NETS); |
242b90e1 | 3260 | ::arg().preParseFile(configname.c_str(), "include-dir"); |
829849d6 AT |
3261 | ::arg().preParse(g_argc, g_argv, "include-dir"); |
3262 | ||
3263 | // then process includes | |
3264 | std::vector<std::string> extraConfigs; | |
242b90e1 AT |
3265 | ::arg().gatherIncludes(extraConfigs); |
3266 | ||
1dc8f4d0 | 3267 | for(const std::string& fn : extraConfigs) { |
7e818521 | 3268 | if(!::arg().preParseFile(fn.c_str(), "allow-from-file", ::arg()["allow-from-file"])) |
3269 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
3270 | if(!::arg().preParseFile(fn.c_str(), "allow-from", ::arg()["allow-from"])) | |
3271 | throw runtime_error("Unable to re-parse configuration file include '"+fn+"'"); | |
829849d6 | 3272 | } |
ca2c884c AT |
3273 | |
3274 | ::arg().preParse(g_argc, g_argv, "allow-from-file"); | |
3275 | ::arg().preParse(g_argc, g_argv, "allow-from"); | |
f27e6356 | 3276 | } |
49a699c4 | 3277 | |
f26bf547 RG |
3278 | std::shared_ptr<NetmaskGroup> oldAllowFrom = t_allowFrom; |
3279 | std::shared_ptr<NetmaskGroup> allowFrom = std::make_shared<NetmaskGroup>(); | |
3ddb9247 | 3280 | |
2c95fc65 BH |
3281 | if(!::arg()["allow-from-file"].empty()) { |
3282 | string line; | |
2c95fc65 BH |
3283 | ifstream ifs(::arg()["allow-from-file"].c_str()); |
3284 | if(!ifs) { | |
9c61b9d0 | 3285 | throw runtime_error("Could not open '"+::arg()["allow-from-file"]+"': "+stringerror()); |
2c95fc65 BH |
3286 | } |
3287 | ||
3288 | string::size_type pos; | |
3289 | while(getline(ifs,line)) { | |
3290 | pos=line.find('#'); | |
3291 | if(pos!=string::npos) | |
3292 | line.resize(pos); | |
3293 | trim(line); | |
3294 | if(line.empty()) | |
3295 | continue; | |
3296 | ||
18af64a8 | 3297 | allowFrom->addMask(line); |
2c95fc65 | 3298 | } |
e6a9dde5 | 3299 | g_log<<Logger::Warning<<"Done parsing " << allowFrom->size() <<" allow-from ranges from file '"<<::arg()["allow-from-file"]<<"' - overriding 'allow-from' setting"<<endl; |
2c95fc65 BH |
3300 | } |
3301 | else if(!::arg()["allow-from"].empty()) { | |
f7c1d4e3 BH |
3302 | vector<string> ips; |
3303 | stringtok(ips, ::arg()["allow-from"], ", "); | |
3ddb9247 | 3304 | |
e6a9dde5 | 3305 | g_log<<Logger::Warning<<"Only allowing queries from: "; |
f7c1d4e3 | 3306 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { |
18af64a8 | 3307 | allowFrom->addMask(*i); |
f7c1d4e3 | 3308 | if(i!=ips.begin()) |
e6a9dde5 PL |
3309 | g_log<<Logger::Warning<<", "; |
3310 | g_log<<Logger::Warning<<*i; | |
f7c1d4e3 | 3311 | } |
e6a9dde5 | 3312 | g_log<<Logger::Warning<<endl; |
f7c1d4e3 | 3313 | } |
49a699c4 | 3314 | else { |
3ddb9247 | 3315 | if(::arg()["local-address"]!="127.0.0.1" && ::arg().asNum("local-port")==53) |
377602e3 | 3316 | g_log<<Logger::Warning<<"WARNING: Allowing queries from all IP addresses - this can be a security risk!"<<endl; |
f26bf547 | 3317 | allowFrom = nullptr; |
49a699c4 | 3318 | } |
3ddb9247 | 3319 | |
49a699c4 | 3320 | g_initialAllowFrom = allowFrom; |
d7dae798 | 3321 | broadcastFunction(boost::bind(pleaseSupplantACLs, allowFrom)); |
f26bf547 | 3322 | oldAllowFrom = nullptr; |
3ddb9247 | 3323 | |
49a699c4 | 3324 | l_initialized = true; |
18af64a8 BH |
3325 | } |
3326 | ||
795215f2 | 3327 | |
756e82cf | 3328 | static void setupDelegationOnly() |
3329 | { | |
3330 | vector<string> parts; | |
3331 | stringtok(parts, ::arg()["delegation-only"], ", \t"); | |
3332 | for(const auto& p : parts) { | |
9065eb05 | 3333 | SyncRes::addDelegationOnly(DNSName(p)); |
756e82cf | 3334 | } |
3335 | } | |
795215f2 | 3336 | |
8fd25133 RG |
3337 | static std::map<unsigned int, std::set<int> > parseCPUMap() |
3338 | { | |
3339 | std::map<unsigned int, std::set<int> > result; | |
3340 | ||
3341 | const std::string value = ::arg()["cpu-map"]; | |
3342 | ||
3343 | if (!value.empty() && !isSettingThreadCPUAffinitySupported()) { | |
e6a9dde5 | 3344 | g_log<<Logger::Warning<<"CPU mapping requested but not supported, skipping"<<endl; |
8fd25133 RG |
3345 | return result; |
3346 | } | |
3347 | ||
3348 | std::vector<std::string> parts; | |
3349 | ||
3350 | stringtok(parts, value, " \t"); | |
3351 | ||
3352 | for(const auto& part : parts) { | |
3353 | if (part.find('=') == string::npos) | |
3354 | continue; | |
3355 | ||
3356 | try { | |
3357 | auto headers = splitField(part, '='); | |
3358 | trim(headers.first); | |
3359 | trim(headers.second); | |
3360 | ||
3361 | unsigned int threadId = pdns_stou(headers.first); | |
3362 | std::vector<std::string> cpus; | |
3363 | ||
3364 | stringtok(cpus, headers.second, ","); | |
3365 | ||
3366 | for(const auto& cpu : cpus) { | |
3367 | int cpuId = std::stoi(cpu); | |
3368 | ||
3369 | result[threadId].insert(cpuId); | |
3370 | } | |
3371 | } | |
3372 | catch(const std::exception& e) { | |
e6a9dde5 | 3373 | g_log<<Logger::Error<<"Error parsing cpu-map entry '"<<part<<"': "<<e.what()<<endl; |
8fd25133 RG |
3374 | } |
3375 | } | |
3376 | ||
3377 | return result; | |
3378 | } | |
3379 | ||
3380 | static void setCPUMap(const std::map<unsigned int, std::set<int> >& cpusMap, unsigned int n, pthread_t tid) | |
3381 | { | |
3382 | const auto& cpuMapping = cpusMap.find(n); | |
3383 | if (cpuMapping != cpusMap.cend()) { | |
3384 | int rc = mapThreadToCPUList(tid, cpuMapping->second); | |
3385 | if (rc == 0) { | |
e6a9dde5 | 3386 | g_log<<Logger::Info<<"CPU affinity for worker "<<n<<" has been set to CPU map:"; |
8fd25133 | 3387 | for (const auto cpu : cpuMapping->second) { |
e6a9dde5 | 3388 | g_log<<Logger::Info<<" "<<cpu; |
8fd25133 | 3389 | } |
e6a9dde5 | 3390 | g_log<<Logger::Info<<endl; |
8fd25133 RG |
3391 | } |
3392 | else { | |
e6a9dde5 | 3393 | g_log<<Logger::Warning<<"Error setting CPU affinity for worker "<<n<<" to CPU map:"; |
8fd25133 | 3394 | for (const auto cpu : cpuMapping->second) { |
e6a9dde5 | 3395 | g_log<<Logger::Info<<" "<<cpu; |
8fd25133 | 3396 | } |
e6a9dde5 | 3397 | g_log<<Logger::Info<<strerror(rc)<<endl; |
8fd25133 RG |
3398 | } |
3399 | } | |
3400 | } | |
3401 | ||
af1377b7 NC |
3402 | #ifdef NOD_ENABLED |
3403 | static void setupNODThread() | |
3404 | { | |
3405 | if (g_nodEnabled) { | |
b78727c6 NC |
3406 | uint32_t num_cells = ::arg().asNum("new-domain-db-size"); |
3407 | t_nodDBp = std::make_shared<nod::NODDB>(num_cells); | |
af1377b7 NC |
3408 | try { |
3409 | t_nodDBp->setCacheDir(::arg()["new-domain-history-dir"]); | |
3410 | } | |
3411 | catch (const PDNSException& e) { | |
3412 | g_log<<Logger::Error<<"new-domain-history-dir (" << ::arg()["new-domain-history-dir"] << ") is not readable or does not exist"<<endl; | |
3413 | _exit(1); | |
3414 | } | |
3415 | if (!t_nodDBp->init()) { | |
3416 | g_log<<Logger::Error<<"Could not initialize domain tracking"<<endl; | |
3417 | _exit(1); | |
3418 | } | |
41c542ec | 3419 | std::thread t(nod::NODDB::startHousekeepingThread, t_nodDBp, std::this_thread::get_id()); |
af1377b7 | 3420 | t.detach(); |
ca2526f5 | 3421 | g_nod_pbtag = ::arg()["new-domain-pb-tag"]; |
41c542ec NC |
3422 | } |
3423 | if (g_udrEnabled) { | |
b78727c6 NC |
3424 | uint32_t num_cells = ::arg().asNum("unique-response-db-size"); |
3425 | t_udrDBp = std::make_shared<nod::UniqueResponseDB>(num_cells); | |
41c542ec NC |
3426 | try { |
3427 | t_udrDBp->setCacheDir(::arg()["unique-response-history-dir"]); | |
3428 | } | |
3429 | catch (const PDNSException& e) { | |
3430 | g_log<<Logger::Error<<"unique-response-history-dir (" << ::arg()["unique-response-history-dir"] << ") is not readable or does not exist"<<endl; | |
3431 | _exit(1); | |
3432 | } | |
3433 | if (!t_udrDBp->init()) { | |
3434 | g_log<<Logger::Error<<"Could not initialize unique response tracking"<<endl; | |
3435 | _exit(1); | |
3436 | } | |
3437 | std::thread t(nod::UniqueResponseDB::startHousekeepingThread, t_udrDBp, std::this_thread::get_id()); | |
af1377b7 | 3438 | t.detach(); |
ca2526f5 | 3439 | g_udr_pbtag = ::arg()["unique-response-pb-tag"]; |
af1377b7 NC |
3440 | } |
3441 | } | |
3442 | ||
3443 | void parseNODWhitelist(const std::string& wlist) | |
3444 | { | |
3445 | vector<string> parts; | |
3446 | stringtok(parts, wlist, ",; "); | |
3447 | for(const auto& a : parts) { | |
3448 | g_nodDomainWL.add(DNSName(a)); | |
3449 | } | |
3450 | } | |
3451 | ||
3452 | static void setupNODGlobal() | |
3453 | { | |
3454 | // Setup NOD subsystem | |
3455 | g_nodEnabled = ::arg().mustDo("new-domain-tracking"); | |
3456 | g_nodLookupDomain = DNSName(::arg()["new-domain-lookup"]); | |
3457 | g_nodLog = ::arg().mustDo("new-domain-log"); | |
3458 | parseNODWhitelist(::arg()["new-domain-whitelist"]); | |
41c542ec NC |
3459 | |
3460 | // Setup Unique DNS Response subsystem | |
3461 | g_udrEnabled = ::arg().mustDo("unique-response-tracking"); | |
3462 | g_udrLog = ::arg().mustDo("unique-response-log"); | |
af1377b7 NC |
3463 | } |
3464 | #endif /* NOD_ENABLED */ | |
3465 | ||
d187038c | 3466 | static int serviceMain(int argc, char*argv[]) |
18af64a8 | 3467 | { |
e6a9dde5 PL |
3468 | g_log.setName(s_programname); |
3469 | g_log.disableSyslog(::arg().mustDo("disable-syslog")); | |
3470 | g_log.setTimestamps(::arg().mustDo("log-timestamp")); | |
18af64a8 BH |
3471 | |
3472 | if(!::arg()["logging-facility"].empty()) { | |
f8499e52 BH |
3473 | int val=logFacilityToLOG(::arg().asNum("logging-facility") ); |
3474 | if(val >= 0) | |
e6a9dde5 | 3475 | g_log.setFacility(val); |
18af64a8 | 3476 | else |
e6a9dde5 | 3477 | g_log<<Logger::Error<<"Unknown logging facility "<<::arg().asNum("logging-facility") <<endl; |
18af64a8 BH |
3478 | } |
3479 | ||
ba1a571d | 3480 | showProductVersion(); |
3afde9b2 | 3481 | |
06ea9015 | 3482 | g_disthashseed=dns_random(0xffffffff); |
3483 | ||
b7ef5828 PL |
3484 | checkLinuxIPv6Limits(); |
3485 | try { | |
3486 | vector<string> addrs; | |
3487 | if(!::arg()["query-local-address6"].empty()) { | |
3488 | SyncRes::s_doIPv6=true; | |
e6a9dde5 | 3489 | g_log<<Logger::Warning<<"Enabling IPv6 transport for outgoing queries"<<endl; |
b7ef5828 PL |
3490 | |
3491 | stringtok(addrs, ::arg()["query-local-address6"], ", ;"); | |
3492 | for(const string& addr : addrs) { | |
3493 | g_localQueryAddresses6.push_back(ComboAddress(addr)); | |
3494 | } | |
3495 | } | |
3496 | else { | |
e6a9dde5 | 3497 | g_log<<Logger::Warning<<"NOT using IPv6 for outgoing queries - set 'query-local-address6=::' to enable"<<endl; |
b7ef5828 PL |
3498 | } |
3499 | addrs.clear(); | |
3500 | stringtok(addrs, ::arg()["query-local-address"], ", ;"); | |
3501 | for(const string& addr : addrs) { | |
3502 | g_localQueryAddresses4.push_back(ComboAddress(addr)); | |
3503 | } | |
3504 | } | |
3505 | catch(std::exception& e) { | |
e6a9dde5 | 3506 | g_log<<Logger::Error<<"Assigning local query addresses: "<<e.what(); |
b7ef5828 PL |
3507 | exit(99); |
3508 | } | |
3509 | ||
e48c6b8a PL |
3510 | // keep this ABOVE loadRecursorLuaConfig! |
3511 | if(::arg()["dnssec"]=="off") | |
3512 | g_dnssecmode=DNSSECMode::Off; | |
3513 | else if(::arg()["dnssec"]=="process-no-validate") | |
3514 | g_dnssecmode=DNSSECMode::ProcessNoValidate; | |
3515 | else if(::arg()["dnssec"]=="process") | |
3516 | g_dnssecmode=DNSSECMode::Process; | |
3517 | else if(::arg()["dnssec"]=="validate") | |
3518 | g_dnssecmode=DNSSECMode::ValidateAll; | |
3519 | else if(::arg()["dnssec"]=="log-fail") | |
3520 | g_dnssecmode=DNSSECMode::ValidateForLog; | |
3521 | else { | |
e6a9dde5 | 3522 | g_log<<Logger::Error<<"Unknown DNSSEC mode "<<::arg()["dnssec"]<<endl; |
e48c6b8a PL |
3523 | exit(1); |
3524 | } | |
3525 | ||
9a3ab3e4 KM |
3526 | g_signatureInceptionSkew = ::arg().asNum("signature-inception-skew"); |
3527 | if (g_signatureInceptionSkew < 0) { | |
3528 | g_log<<Logger::Error<<"A negative value for 'signature-inception-skew' is not allowed"<<endl; | |
3529 | exit(1); | |
3530 | } | |
3531 | ||
e48c6b8a | 3532 | g_dnssecLogBogus = ::arg().mustDo("dnssec-log-bogus"); |
d377bb54 | 3533 | g_maxNSEC3Iterations = ::arg().asNum("nsec3-max-iterations"); |
e48c6b8a | 3534 | |
a6f7f5fe | 3535 | g_maxCacheEntries = ::arg().asNum("max-cache-entries"); |
3536 | g_maxPacketCacheEntries = ::arg().asNum("max-packetcache-entries"); | |
e6ec15bf RG |
3537 | |
3538 | luaConfigDelayedThreads delayedLuaThreads; | |
0f5785a6 | 3539 | try { |
e6ec15bf | 3540 | loadRecursorLuaConfig(::arg()["lua-config-file"], delayedLuaThreads); |
0f5785a6 PL |
3541 | } |
3542 | catch (PDNSException &e) { | |
e6a9dde5 | 3543 | g_log<<Logger::Error<<"Cannot load Lua configuration: "<<e.reason<<endl; |
0f5785a6 PL |
3544 | exit(1); |
3545 | } | |
ad42489c | 3546 | |
18af64a8 | 3547 | parseACLs(); |
d6f3fcfa | 3548 | initPublicSuffixList(::arg()["public-suffix-list-file"]); |
92011b8f | 3549 | |
eb5bae86 | 3550 | if(!::arg()["dont-query"].empty()) { |
eb5bae86 BH |
3551 | vector<string> ips; |
3552 | stringtok(ips, ::arg()["dont-query"], ", "); | |
66e0b6ea BH |
3553 | ips.push_back("0.0.0.0"); |
3554 | ips.push_back("::"); | |
c36bc97a | 3555 | |
e6a9dde5 | 3556 | g_log<<Logger::Warning<<"Will not send queries to: "; |
eb5bae86 | 3557 | for(vector<string>::const_iterator i = ips.begin(); i!= ips.end(); ++i) { |
9065eb05 | 3558 | SyncRes::addDontQuery(*i); |
eb5bae86 | 3559 | if(i!=ips.begin()) |
e6a9dde5 PL |
3560 | g_log<<Logger::Warning<<", "; |
3561 | g_log<<Logger::Warning<<*i; | |
eb5bae86 | 3562 | } |
e6a9dde5 | 3563 | g_log<<Logger::Warning<<endl; |
eb5bae86 BH |
3564 | } |
3565 | ||
f7c1d4e3 | 3566 | g_quiet=::arg().mustDo("quiet"); |
3ddb9247 | 3567 | |
b243ca3b | 3568 | /* this needs to be done before parseACLs(), which call broadcastFunction() */ |
1bc3c142 BH |
3569 | g_weDistributeQueries = ::arg().mustDo("pdns-distributes-queries"); |
3570 | if(g_weDistributeQueries) { | |
b243ca3b | 3571 | g_log<<Logger::Warning<<"PowerDNS Recursor itself will distribute queries over threads"<<endl; |
1bc3c142 | 3572 | } |
3ddb9247 | 3573 | |
756e82cf | 3574 | setupDelegationOnly(); |
b33c2462 | 3575 | g_outgoingEDNSBufsize=::arg().asNum("edns-outgoing-bufsize"); |
756e82cf | 3576 | |
77499b05 BH |
3577 | if(::arg()["trace"]=="fail") { |
3578 | SyncRes::setDefaultLogMode(SyncRes::Store); | |
3579 | } | |
3580 | else if(::arg().mustDo("trace")) { | |
3581 | SyncRes::setDefaultLogMode(SyncRes::Log); | |
f7c1d4e3 BH |
3582 | ::arg().set("quiet")="no"; |
3583 | g_quiet=false; | |
3e9c6c0a | 3584 | g_dnssecLOG=true; |
f7c1d4e3 | 3585 | } |
43a9b290 PL |
3586 | string myHostname = getHostname(); |
3587 | if (myHostname == "UNKNOWN"){ | |
3588 | g_log<<Logger::Warning<<"Unable to get the hostname, NSID and id.server values will be empty"<<endl; | |
3589 | myHostname = ""; | |
d0983bff | 3590 | } |
3ddb9247 | 3591 | |
aadceba8 | 3592 | SyncRes::s_minimumTTL = ::arg().asNum("minimum-ttl-override"); |
3593 | ||
1051f8a9 BH |
3594 | SyncRes::s_nopacketcache = ::arg().mustDo("disable-packetcache"); |
3595 | ||
f7c1d4e3 | 3596 | SyncRes::s_maxnegttl=::arg().asNum("max-negative-ttl"); |
63637fd8 | 3597 | SyncRes::s_maxcachettl=max(::arg().asNum("max-cache-ttl"), 15); |
1051f8a9 | 3598 | SyncRes::s_packetcachettl=::arg().asNum("packetcache-ttl"); |
79ec0627 PL |
3599 | // Cap the packetcache-servfail-ttl to the packetcache-ttl |
3600 | uint32_t packetCacheServFailTTL = ::arg().asNum("packetcache-servfail-ttl"); | |
3601 | SyncRes::s_packetcacheservfailttl=(packetCacheServFailTTL > SyncRes::s_packetcachettl) ? SyncRes::s_packetcachettl : packetCacheServFailTTL; | |
628e2c7b PA |
3602 | SyncRes::s_serverdownmaxfails=::arg().asNum("server-down-max-fails"); |
3603 | SyncRes::s_serverdownthrottletime=::arg().asNum("server-down-throttle-time"); | |
f7c1d4e3 | 3604 | SyncRes::s_serverID=::arg()["server-id"]; |
173d790e | 3605 | SyncRes::s_maxqperq=::arg().asNum("max-qperq"); |
9de3e034 | 3606 | SyncRes::s_maxtotusec=1000*::arg().asNum("max-total-msec"); |
7c3398aa | 3607 | SyncRes::s_maxdepth=::arg().asNum("max-recursion-depth"); |
01402d56 | 3608 | SyncRes::s_rootNXTrust = ::arg().mustDo( "root-nx-trust"); |
f7c1d4e3 | 3609 | if(SyncRes::s_serverID.empty()) { |
d0983bff | 3610 | SyncRes::s_serverID = myHostname; |
f7c1d4e3 | 3611 | } |
3ddb9247 | 3612 | |
e9f9b8ec RG |
3613 | SyncRes::s_ecsipv4limit = ::arg().asNum("ecs-ipv4-bits"); |
3614 | SyncRes::s_ecsipv6limit = ::arg().asNum("ecs-ipv6-bits"); | |
3615 | ||
8a3a3822 RG |
3616 | if (!::arg().isEmpty("ecs-scope-zero-address")) { |
3617 | ComboAddress scopeZero(::arg()["ecs-scope-zero-address"]); | |
3618 | SyncRes::setECSScopeZeroAddress(Netmask(scopeZero, scopeZero.isIPv4() ? 32 : 128)); | |
3619 | } | |
3620 | else { | |
3621 | bool found = false; | |
3622 | for (const auto& addr : g_localQueryAddresses4) { | |
3623 | if (!IsAnyAddress(addr)) { | |
3624 | SyncRes::setECSScopeZeroAddress(Netmask(addr, 32)); | |
3625 | found = true; | |
3626 | break; | |
3627 | } | |
3628 | } | |
3629 | if (!found) { | |
3630 | for (const auto& addr : g_localQueryAddresses6) { | |
3631 | if (!IsAnyAddress(addr)) { | |
3632 | SyncRes::setECSScopeZeroAddress(Netmask(addr, 128)); | |
3633 | found = true; | |
3634 | break; | |
3635 | } | |
3636 | } | |
3637 | if (!found) { | |
3638 | SyncRes::setECSScopeZeroAddress(Netmask("127.0.0.1/32")); | |
3639 | } | |
3640 | } | |
3641 | } | |
3642 | ||
2fe3354d CH |
3643 | SyncRes::parseEDNSSubnetWhitelist(::arg()["edns-subnet-whitelist"]); |
3644 | SyncRes::parseEDNSSubnetAddFor(::arg()["ecs-add-for"]); | |
3645 | g_useIncomingECS = ::arg().mustDo("use-incoming-edns-subnet"); | |
3646 | ||
5cc8371b | 3647 | g_XPFAcl.toMasks(::arg()["xpf-allow-from"]); |
59cb4a79 | 3648 | g_xpfRRCode = ::arg().asNum("xpf-rr-code"); |
5cc8371b | 3649 | |
5b0ddd18 | 3650 | g_networkTimeoutMsec = ::arg().asNum("network-timeout"); |
bb4bdbaf | 3651 | |
49a699c4 | 3652 | g_initialDomainMap = parseAuthAndForwards(); |
3ddb9247 | 3653 | |
08f3f638 | 3654 | g_latencyStatSize=::arg().asNum("latency-statistic-size"); |
3ddb9247 | 3655 | |
f7c1d4e3 | 3656 | g_logCommonErrors=::arg().mustDo("log-common-errors"); |
98d36505 | 3657 | g_logRPZChanges = ::arg().mustDo("log-rpz-changes"); |
e661a20b PD |
3658 | |
3659 | g_anyToTcp = ::arg().mustDo("any-to-tcp"); | |
a09a8ce0 PD |
3660 | g_udpTruncationThreshold = ::arg().asNum("udp-truncation-threshold"); |
3661 | ||
b3adda56 PD |
3662 | g_lowercaseOutgoing = ::arg().mustDo("lowercase-outgoing"); |
3663 | ||
b243ca3b | 3664 | g_numDistributorThreads = ::arg().asNum("distributor-threads"); |
810ff705 | 3665 | g_numWorkerThreads = ::arg().asNum("threads"); |
1c4f2e1b | 3666 | if (g_numWorkerThreads < 1) { |
e6a9dde5 | 3667 | g_log<<Logger::Warning<<"Asked to run with 0 threads, raising to 1 instead"<<endl; |
1c4f2e1b RG |
3668 | g_numWorkerThreads = 1; |
3669 | } | |
3670 | ||
b243ca3b | 3671 | g_numThreads = g_numDistributorThreads + g_numWorkerThreads; |
810ff705 RG |
3672 | g_maxMThreads = ::arg().asNum("max-mthreads"); |
3673 | ||
00b8cadc RG |
3674 | g_gettagNeedsEDNSOptions = ::arg().mustDo("gettag-needs-edns-options"); |
3675 | ||
0ec489bf | 3676 | g_statisticsInterval = ::arg().asNum("statistics-interval"); |
3677 | ||
810ff705 RG |
3678 | #ifdef SO_REUSEPORT |
3679 | g_reusePort = ::arg().mustDo("reuseport"); | |
3680 | #endif | |
3681 | ||
b243ca3b | 3682 | s_threadInfos.resize(g_numDistributorThreads + g_numWorkerThreads + /* handler */ 1); |
810ff705 | 3683 | |
b243ca3b RG |
3684 | if (g_reusePort) { |
3685 | if (g_weDistributeQueries) { | |
3686 | /* first thread is the handler, then distributors */ | |
3687 | for (unsigned int threadId = 1; threadId <= g_numDistributorThreads; threadId++) { | |
3688 | auto& deferredAdds = s_threadInfos.at(threadId).deferredAdds; | |
adb6cd72 | 3689 | auto& tcpSockets = s_threadInfos.at(threadId).tcpSockets; |
b243ca3b | 3690 | makeUDPServerSockets(deferredAdds); |
adb6cd72 | 3691 | makeTCPServerSockets(deferredAdds, tcpSockets); |
b243ca3b RG |
3692 | } |
3693 | } | |
3694 | else { | |
3695 | /* first thread is the handler, there is no distributor here and workers are accepting queries */ | |
3696 | for (unsigned int threadId = 1; threadId <= g_numWorkerThreads; threadId++) { | |
3697 | auto& deferredAdds = s_threadInfos.at(threadId).deferredAdds; | |
adb6cd72 | 3698 | auto& tcpSockets = s_threadInfos.at(threadId).tcpSockets; |
b243ca3b | 3699 | makeUDPServerSockets(deferredAdds); |
adb6cd72 | 3700 | makeTCPServerSockets(deferredAdds, tcpSockets); |
b243ca3b | 3701 | } |
810ff705 RG |
3702 | } |
3703 | } | |
3704 | else { | |
c47f201b | 3705 | std::set<int> tcpSockets; |
b243ca3b RG |
3706 | /* we don't have reuseport so we can only open one socket per |
3707 | listening addr:port and everyone will listen on it */ | |
3708 | makeUDPServerSockets(g_deferredAdds); | |
c47f201b RG |
3709 | makeTCPServerSockets(g_deferredAdds, tcpSockets); |
3710 | ||
3711 | /* every listener (so distributor if g_weDistributeQueries, workers otherwise) | |
3712 | needs to listen to the shared sockets */ | |
3713 | if (g_weDistributeQueries) { | |
3714 | /* first thread is the handler, then distributors */ | |
3715 | for (unsigned int threadId = 1; threadId <= g_numDistributorThreads; threadId++) { | |
3716 | s_threadInfos.at(threadId).tcpSockets = tcpSockets; | |
3717 | } | |
3718 | } | |
3719 | else { | |
3720 | /* first thread is the handler, there is no distributor here and workers are accepting queries */ | |
3721 | for (unsigned int threadId = 1; threadId <= g_numWorkerThreads; threadId++) { | |
3722 | s_threadInfos.at(threadId).tcpSockets = tcpSockets; | |
3723 | } | |
3724 | } | |
810ff705 | 3725 | } |
815099b2 | 3726 | |
af1377b7 NC |
3727 | #ifdef NOD_ENABLED |
3728 | // Setup newly observed domain globals | |
3729 | setupNODGlobal(); | |
3730 | #endif /* NOD_ENABLED */ | |
3731 | ||
677e2a46 BH |
3732 | int forks; |
3733 | for(forks = 0; forks < ::arg().asNum("processes") - 1; ++forks) { | |
1bc3c142 BH |
3734 | if(!fork()) // we are child |
3735 | break; | |
3736 | } | |
3ddb9247 | 3737 | |
f7c1d4e3 | 3738 | if(::arg().mustDo("daemon")) { |
e6a9dde5 PL |
3739 | g_log<<Logger::Warning<<"Calling daemonize, going to background"<<endl; |
3740 | g_log.toConsole(Logger::Critical); | |
f7c1d4e3 BH |
3741 | daemonize(); |
3742 | } | |
3743 | signal(SIGUSR1,usr1Handler); | |
3744 | signal(SIGUSR2,usr2Handler); | |
3745 | signal(SIGPIPE,SIG_IGN); | |
810ff705 | 3746 | |
a6414fdc | 3747 | checkOrFixFDS(); |
3ddb9247 | 3748 | |
d1b28475 KM |
3749 | #ifdef HAVE_LIBSODIUM |
3750 | if (sodium_init() == -1) { | |
e6a9dde5 | 3751 | g_log<<Logger::Error<<"Unable to initialize sodium crypto library"<<endl; |
d1b28475 KM |
3752 | exit(99); |
3753 | } | |
3754 | #endif | |
3755 | ||
3afde9b2 PL |
3756 | openssl_thread_setup(); |
3757 | openssl_seed(); | |
e97cb679 AT |
3758 | /* setup rng before chroot */ |
3759 | dns_random_init(); | |
3afde9b2 | 3760 | |
bdbb07e0 | 3761 | if(::arg()["server-id"].empty()) { |
d0983bff | 3762 | ::arg().set("server-id") = myHostname; |
bdbb07e0 PL |
3763 | } |
3764 | ||
138435cb BH |
3765 | int newgid=0; |
3766 | if(!::arg()["setgid"].empty()) | |
3767 | newgid=Utility::makeGidNumeric(::arg()["setgid"]); | |
3768 | int newuid=0; | |
3769 | if(!::arg()["setuid"].empty()) | |
3770 | newuid=Utility::makeUidNumeric(::arg()["setuid"]); | |
3771 | ||
f1d6a7ce KM |
3772 | Utility::dropGroupPrivs(newuid, newgid); |
3773 | ||
138435cb | 3774 | if (!::arg()["chroot"].empty()) { |
75336810 PL |
3775 | #ifdef HAVE_SYSTEMD |
3776 | char *ns; | |
3777 | ns = getenv("NOTIFY_SOCKET"); | |
3778 | if (ns != nullptr) { | |
e6a9dde5 | 3779 | g_log<<Logger::Error<<"Unable to chroot when running from systemd. Please disable chroot= or set the 'Type' for this service to 'simple'"<<endl; |
75336810 PL |
3780 | exit(1); |
3781 | } | |
3782 | #endif | |
138435cb | 3783 | if (chroot(::arg()["chroot"].c_str())<0 || chdir("/") < 0) { |
e6a9dde5 | 3784 | g_log<<Logger::Error<<"Unable to chroot to '"+::arg()["chroot"]+"': "<<strerror (errno)<<", exiting"<<endl; |
138435cb BH |
3785 | exit(1); |
3786 | } | |
f0f3f0b0 | 3787 | else |
377602e3 | 3788 | g_log<<Logger::Info<<"Chrooted to '"<<::arg()["chroot"]<<"'"<<endl; |
138435cb BH |
3789 | } |
3790 | ||
f0f3f0b0 PL |
3791 | s_pidfname=::arg()["socket-dir"]+"/"+s_programname+".pid"; |
3792 | if(!s_pidfname.empty()) | |
3793 | unlink(s_pidfname.c_str()); // remove possible old pid file | |
3794 | writePid(); | |
3795 | ||
3796 | makeControlChannelSocket( ::arg().asNum("processes") > 1 ? forks : -1); | |
3797 | ||
f1d6a7ce | 3798 | Utility::dropUserPrivs(newuid); |
1f2b341e RG |
3799 | try { |
3800 | /* we might still have capabilities remaining, for example if we have been started as root | |
3801 | without --setuid (please don't do that) or as an unprivileged user with ambient capabilities | |
3802 | like CAP_NET_BIND_SERVICE. | |
3803 | */ | |
3804 | dropCapabilities(); | |
3805 | } | |
3806 | catch(const std::exception& e) { | |
3807 | g_log<<Logger::Warning<<e.what()<<endl; | |
3808 | } | |
c0063e60 | 3809 | |
e6ec15bf RG |
3810 | startLuaConfigDelayedThreads(delayedLuaThreads, g_luaconfs.getCopy().generation); |
3811 | ||
49a699c4 | 3812 | makeThreadPipes(); |
3ddb9247 | 3813 | |
5d4dd7fe BH |
3814 | g_tcpTimeout=::arg().asNum("client-tcp-timeout"); |
3815 | g_maxTCPPerClient=::arg().asNum("max-tcp-per-client"); | |
fde296a3 | 3816 | g_tcpMaxQueriesPerConn=::arg().asNum("max-tcp-queries-per-connection"); |
a5886e6a | 3817 | s_maxUDPQueriesPerRound=::arg().asNum("max-udp-queries-per-round"); |
343257a4 | 3818 | |
d705aad9 RG |
3819 | if (::arg().mustDo("snmp-agent")) { |
3820 | g_snmpAgent = std::make_shared<RecursorSNMPAgent>("recursor", ::arg()["snmp-master-socket"]); | |
3821 | g_snmpAgent->run(); | |
3822 | } | |
3823 | ||
b47026fd | 3824 | int port = ::arg().asNum("udp-source-port-min"); |
58da9034 | 3825 | if(port < 1024 || port > 65535){ |
e6a9dde5 | 3826 | g_log<<Logger::Error<<"Unable to launch, udp-source-port-min is not a valid port number"<<endl; |
bf6f28ca CHB |
3827 | exit(99); // this isn't going to fix itself either |
3828 | } | |
3829 | s_minUdpSourcePort = port; | |
b47026fd | 3830 | port = ::arg().asNum("udp-source-port-max"); |
58da9034 | 3831 | if(port < 1024 || port > 65535 || port < s_minUdpSourcePort){ |
e6a9dde5 | 3832 | g_log<<Logger::Error<<"Unable to launch, udp-source-port-max is not a valid port number or is smaller than udp-source-port-min"<<endl; |
bf6f28ca CHB |
3833 | exit(99); // this isn't going to fix itself either |
3834 | } | |
3835 | s_maxUdpSourcePort = port; | |
3836 | std::vector<string> parts {}; | |
b47026fd | 3837 | stringtok(parts, ::arg()["udp-source-port-avoid"], ", "); |
bf6f28ca CHB |
3838 | for (const auto &part : parts) |
3839 | { | |
3840 | port = std::stoi(part); | |
58da9034 | 3841 | if(port < 1024 || port > 65535){ |
e6a9dde5 | 3842 | g_log<<Logger::Error<<"Unable to launch, udp-source-port-avoid contains an invalid port number: "<<part<<endl; |
bf6f28ca CHB |
3843 | exit(99); // this isn't going to fix itself either |
3844 | } | |
3845 | s_avoidUdpSourcePorts.insert(port); | |
3846 | } | |
3847 | ||
b243ca3b | 3848 | unsigned int currentThreadId = 1; |
8fd25133 | 3849 | const auto cpusMap = parseCPUMap(); |
d77abca1 | 3850 | |
c3828c03 | 3851 | if(g_numThreads == 1) { |
e6a9dde5 | 3852 | g_log<<Logger::Warning<<"Operating unthreaded"<<endl; |
6b6720de PL |
3853 | #ifdef HAVE_SYSTEMD |
3854 | sd_notify(0, "READY=1"); | |
3855 | #endif | |
b243ca3b RG |
3856 | |
3857 | /* This thread handles the web server, carbon, statistics and the control channel */ | |
3858 | auto& handlerInfos = s_threadInfos.at(0); | |
3859 | handlerInfos.isHandler = true; | |
c390b2da | 3860 | handlerInfos.thread = std::thread(recursorThread, 0, "main"); |
b243ca3b RG |
3861 | |
3862 | setCPUMap(cpusMap, currentThreadId, pthread_self()); | |
3863 | ||
3864 | auto& infos = s_threadInfos.at(currentThreadId); | |
3865 | infos.isListener = true; | |
3866 | infos.isWorker = true; | |
c390b2da | 3867 | recursorThread(currentThreadId++, "worker"); |
76698c6e BH |
3868 | } |
3869 | else { | |
8fd25133 | 3870 | |
b243ca3b RG |
3871 | if (g_weDistributeQueries) { |
3872 | g_log<<Logger::Warning<<"Launching "<< g_numDistributorThreads <<" distributor threads"<<endl; | |
3873 | for(unsigned int n=0; n < g_numDistributorThreads; ++n) { | |
3874 | auto& infos = s_threadInfos.at(currentThreadId); | |
3875 | infos.isListener = true; | |
c390b2da | 3876 | infos.thread = std::thread(recursorThread, currentThreadId++, "distr"); |
b243ca3b RG |
3877 | |
3878 | setCPUMap(cpusMap, currentThreadId, infos.thread.native_handle()); | |
3879 | } | |
3880 | } | |
8fd25133 | 3881 | |
62b549e0 RG |
3882 | g_log<<Logger::Warning<<"Launching "<< g_numWorkerThreads <<" worker threads"<<endl; |
3883 | ||
b243ca3b RG |
3884 | for(unsigned int n=0; n < g_numWorkerThreads; ++n) { |
3885 | auto& infos = s_threadInfos.at(currentThreadId); | |
3886 | infos.isListener = g_weDistributeQueries ? false : true; | |
3887 | infos.isWorker = true; | |
c390b2da | 3888 | infos.thread = std::thread(recursorThread, currentThreadId++, "worker"); |
b243ca3b RG |
3889 | |
3890 | setCPUMap(cpusMap, currentThreadId, infos.thread.native_handle()); | |
76698c6e | 3891 | } |
b243ca3b | 3892 | |
6b6720de PL |
3893 | #ifdef HAVE_SYSTEMD |
3894 | sd_notify(0, "READY=1"); | |
3895 | #endif | |
b243ca3b RG |
3896 | |
3897 | /* This thread handles the web server, carbon, statistics and the control channel */ | |
3898 | auto& infos = s_threadInfos.at(0); | |
3899 | infos.isHandler = true; | |
c390b2da | 3900 | infos.thread = std::thread(recursorThread, 0, "web+stat"); |
b243ca3b RG |
3901 | |
3902 | s_threadInfos.at(0).thread.join(); | |
bb4bdbaf | 3903 | } |
bb4bdbaf BH |
3904 | return 0; |
3905 | } | |
3906 | ||
c390b2da | 3907 | static void* recursorThread(unsigned int n, const string& threadName) |
bb4bdbaf BH |
3908 | try |
3909 | { | |
d77abca1 | 3910 | t_id=n; |
b243ca3b | 3911 | auto& threadInfo = s_threadInfos.at(t_id); |
c390b2da PL |
3912 | |
3913 | static string threadPrefix = "pdns-r/"; | |
519f5484 | 3914 | setThreadName(threadPrefix + threadName); |
c390b2da | 3915 | |
49a699c4 | 3916 | SyncRes tmp(g_now); // make sure it allocates tsstorage before we do anything, like primeHints or so.. |
a712cb56 | 3917 | SyncRes::setDomainMap(g_initialDomainMap); |
49a699c4 | 3918 | t_allowFrom = g_initialAllowFrom; |
f26bf547 RG |
3919 | t_udpclientsocks = std::unique_ptr<UDPClientSocks>(new UDPClientSocks()); |
3920 | t_tcpClientCounts = std::unique_ptr<tcpClientCounts_t>(new tcpClientCounts_t()); | |
49a699c4 | 3921 | primeHints(); |
3ddb9247 | 3922 | |
f26bf547 | 3923 | t_packetCache = std::unique_ptr<RecursorPacketCache>(new RecursorPacketCache()); |
3ddb9247 | 3924 | |
aa7929a3 | 3925 | #ifdef HAVE_PROTOBUF |
f26bf547 | 3926 | t_uuidGenerator = std::unique_ptr<boost::uuids::random_generator>(new boost::uuids::random_generator()); |
aa7929a3 | 3927 | #endif |
e6a9dde5 | 3928 | g_log<<Logger::Warning<<"Done priming cache with root hints"<<endl; |
3ddb9247 | 3929 | |
af1377b7 | 3930 | #ifdef NOD_ENABLED |
41c542ec NC |
3931 | if (threadInfo.isWorker) |
3932 | setupNODThread(); | |
af1377b7 NC |
3933 | #endif /* NOD_ENABLED */ |
3934 | ||
8fb594ba | 3935 | if(threadInfo.isWorker) { |
5b388d28 PD |
3936 | try { |
3937 | if(!::arg()["lua-dns-script"].empty()) { | |
3938 | t_pdl = std::make_shared<RecursorLua4>(); | |
3939 | t_pdl->loadFile(::arg()["lua-dns-script"]); | |
3940 | g_log<<Logger::Warning<<"Loaded 'lua' script from '"<<::arg()["lua-dns-script"]<<"'"<<endl; | |
3941 | } | |
3942 | } | |
3943 | catch(std::exception &e) { | |
3944 | g_log<<Logger::Error<<"Failed to load 'lua' script from '"<<::arg()["lua-dns-script"]<<"': "<<e.what()<<endl; | |
3945 | _exit(99); | |
674cf0f6 | 3946 | } |
674cf0f6 | 3947 | } |
3ddb9247 | 3948 | |
f8f243b0 | 3949 | unsigned int ringsize=::arg().asNum("stats-ringbuffer-entries") / g_numWorkerThreads; |
92011b8f | 3950 | if(ringsize) { |
f26bf547 | 3951 | t_remotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
b243ca3b RG |
3952 | if(g_weDistributeQueries) |
3953 | t_remotes->set_capacity(::arg().asNum("stats-ringbuffer-entries") / g_numDistributorThreads); | |
f8f243b0 | 3954 | else |
3ddb9247 | 3955 | t_remotes->set_capacity(ringsize); |
f26bf547 | 3956 | t_servfailremotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3ddb9247 | 3957 | t_servfailremotes->set_capacity(ringsize); |
66f2e6ad KM |
3958 | t_bogusremotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3959 | t_bogusremotes->set_capacity(ringsize); | |
f26bf547 | 3960 | t_largeanswerremotes = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3ddb9247 | 3961 | t_largeanswerremotes->set_capacity(ringsize); |
621ccf89 | 3962 | t_timeouts = std::unique_ptr<addrringbuf_t>(new addrringbuf_t()); |
3963 | t_timeouts->set_capacity(ringsize); | |
92011b8f | 3964 | |
f26bf547 | 3965 | t_queryring = std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > >(new boost::circular_buffer<pair<DNSName, uint16_t> >()); |
3ddb9247 | 3966 | t_queryring->set_capacity(ringsize); |
f26bf547 | 3967 | t_servfailqueryring = std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > >(new boost::circular_buffer<pair<DNSName, uint16_t> >()); |
3ddb9247 | 3968 | t_servfailqueryring->set_capacity(ringsize); |
66f2e6ad KM |
3969 | t_bogusqueryring = std::unique_ptr<boost::circular_buffer<pair<DNSName, uint16_t> > >(new boost::circular_buffer<pair<DNSName, uint16_t> >()); |
3970 | t_bogusqueryring->set_capacity(ringsize); | |
92011b8f | 3971 | } |
3ddb9247 | 3972 | |
f26bf547 | 3973 | MT=std::unique_ptr<MTasker<PacketID,string> >(new MTasker<PacketID,string>(::arg().asNum("stack-size"))); |
3ddb9247 | 3974 | |
63341e8d RG |
3975 | #ifdef HAVE_PROTOBUF |
3976 | /* start protobuf export threads if needed */ | |
3977 | auto luaconfsLocal = g_luaconfs.getLocal(); | |
3978 | checkProtobufExport(luaconfsLocal); | |
3979 | checkOutgoingProtobufExport(luaconfsLocal); | |
3980 | #endif /* HAVE_PROTOBUF */ | |
3981 | ||
bb4bdbaf BH |
3982 | PacketID pident; |
3983 | ||
3984 | t_fdm=getMultiplexer(); | |
d77abca1 | 3985 | |
b243ca3b | 3986 | if(threadInfo.isHandler) { |
d07bf7ff | 3987 | if(::arg().mustDo("webserver")) { |
e6a9dde5 | 3988 | g_log<<Logger::Warning << "Enabling web server" << endl; |
8989097d | 3989 | try { |
1ce57618 | 3990 | new RecursorWebServer(t_fdm); |
8989097d CH |
3991 | } |
3992 | catch(PDNSException &e) { | |
e6a9dde5 | 3993 | g_log<<Logger::Error<<"Exception: "<<e.reason<<endl; |
8989097d CH |
3994 | exit(99); |
3995 | } | |
f3d1d67b | 3996 | } |
377602e3 | 3997 | g_log<<Logger::Info<<"Enabled '"<< t_fdm->getName() << "' multiplexer"<<endl; |
f3d1d67b | 3998 | } |
810ff705 | 3999 | else { |
d77abca1 | 4000 | |
b243ca3b RG |
4001 | t_fdm->addReadFD(threadInfo.pipes.readToThread, handlePipeRequest); |
4002 | t_fdm->addReadFD(threadInfo.pipes.readQueriesToThread, handlePipeRequest); | |
4003 | ||
4004 | if (threadInfo.isListener) { | |
4005 | if (g_reusePort) { | |
4006 | /* then every listener has its own FDs */ | |
4007 | for(const auto deferred : threadInfo.deferredAdds) { | |
4008 | t_fdm->addReadFD(deferred.first, deferred.second); | |
4009 | } | |
810ff705 | 4010 | } |
b243ca3b RG |
4011 | else { |
4012 | /* otherwise all listeners are listening on the same ones */ | |
4013 | for(const auto deferred : g_deferredAdds) { | |
4014 | t_fdm->addReadFD(deferred.first, deferred.second); | |
d77abca1 RG |
4015 | } |
4016 | } | |
4017 | } | |
810ff705 | 4018 | } |
3ddb9247 | 4019 | |
b0b37121 | 4020 | registerAllStats(); |
d77abca1 | 4021 | |
b243ca3b | 4022 | if(threadInfo.isHandler) { |
674cf0f6 BH |
4023 | t_fdm->addReadFD(s_rcc.d_fd, handleRCC); // control channel |
4024 | } | |
1bc3c142 | 4025 | |
f7c1d4e3 | 4026 | unsigned int maxTcpClients=::arg().asNum("max-tcp-clients"); |
3ddb9247 | 4027 | |
f7c1d4e3 | 4028 | bool listenOnTCP(true); |
49a699c4 | 4029 | |
cb1523d1 | 4030 | time_t last_stat = 0; |
a2f87dd1 | 4031 | time_t last_carbon=0, last_lua_maintenance=0; |
2c78bd57 | 4032 | time_t carbonInterval=::arg().asNum("carbon-interval"); |
a2f87dd1 | 4033 | time_t luaMaintenanceInterval=::arg().asNum("lua-maintenance-interval"); |
ac0995bb | 4034 | counter.store(0); // used to periodically execute certain tasks |
f7c1d4e3 | 4035 | for(;;) { |
ac0e821b | 4036 | while(MT->schedule(&g_now)); // MTasker letting the mthreads do their thing |
3ddb9247 | 4037 | |
3427fa8a BH |
4038 | if(!(counter%500)) { |
4039 | MT->makeThread(houseKeeping, 0); | |
f7c1d4e3 BH |
4040 | } |
4041 | ||
d2392145 | 4042 | if(!(counter%55)) { |
d8f6d49f | 4043 | typedef vector<pair<int, FDMultiplexer::funcparam_t> > expired_t; |
bb4bdbaf | 4044 | expired_t expired=t_fdm->getTimeouts(g_now); |
3ddb9247 | 4045 | |
f7c1d4e3 | 4046 | for(expired_t::iterator i=expired.begin() ; i != expired.end(); ++i) { |
cd989c87 | 4047 | shared_ptr<TCPConnection> conn=any_cast<shared_ptr<TCPConnection> >(i->second); |
4957a608 | 4048 | if(g_logCommonErrors) |
e6a9dde5 | 4049 | g_log<<Logger::Warning<<"Timeout from remote TCP client "<< conn->d_remote.toStringWithPort() <<endl; |
4957a608 | 4050 | t_fdm->removeReadFD(i->first); |
f7c1d4e3 BH |
4051 | } |
4052 | } | |
3ddb9247 | 4053 | |
f7c1d4e3 BH |
4054 | counter++; |
4055 | ||
b243ca3b | 4056 | if(threadInfo.isHandler) { |
cb1523d1 RG |
4057 | if(statsWanted || (g_statisticsInterval > 0 && (g_now.tv_sec - last_stat) >= g_statisticsInterval)) { |
4058 | doStats(); | |
4059 | last_stat = g_now.tv_sec; | |
4060 | } | |
f7c1d4e3 | 4061 | |
cb1523d1 | 4062 | Utility::gettimeofday(&g_now, 0); |
2c78bd57 | 4063 | |
cb1523d1 RG |
4064 | if((g_now.tv_sec - last_carbon) >= carbonInterval) { |
4065 | MT->makeThread(doCarbonDump, 0); | |
4066 | last_carbon = g_now.tv_sec; | |
4067 | } | |
2c78bd57 | 4068 | } |
2a0276a9 | 4069 | if (t_pdl != nullptr) { |
9adbe790 | 4070 | // lua-dns-script directive is present, call the maintenance callback if needed |
b243ca3b | 4071 | if (threadInfo.isWorker) { |
2a0276a9 CHB |
4072 | // Only on threads processing queries |
4073 | if(g_now.tv_sec - last_lua_maintenance >= luaMaintenanceInterval) { | |
4074 | t_pdl->maintenance(); | |
4075 | last_lua_maintenance = g_now.tv_sec; | |
4076 | } | |
9adbe790 | 4077 | } |
a2f87dd1 | 4078 | } |
2c78bd57 | 4079 | |
bb4bdbaf | 4080 | t_fdm->run(&g_now); |
3ea54bf0 | 4081 | // 'run' updates g_now for us |
f7c1d4e3 | 4082 | |
b243ca3b | 4083 | if(threadInfo.isListener) { |
5c889cf5 | 4084 | if(listenOnTCP) { |
c47f201b RG |
4085 | if(TCPConnection::getCurrentConnections() > maxTcpClients) { // shutdown, too many connections |
4086 | for(const auto fd : threadInfo.tcpSockets) { | |
4087 | t_fdm->removeReadFD(fd); | |
b243ca3b | 4088 | } |
c47f201b RG |
4089 | listenOnTCP=false; |
4090 | } | |
f7c1d4e3 | 4091 | } |
5c889cf5 | 4092 | else { |
c47f201b RG |
4093 | if(TCPConnection::getCurrentConnections() <= maxTcpClients) { // reenable |
4094 | for(const auto fd : threadInfo.tcpSockets) { | |
4095 | t_fdm->addReadFD(fd, handleNewTCPQuestion); | |
b243ca3b | 4096 | } |
c47f201b RG |
4097 | listenOnTCP=true; |
4098 | } | |
f7c1d4e3 BH |
4099 | } |
4100 | } | |
4101 | } | |
4102 | } | |
3f81d239 | 4103 | catch(PDNSException &ae) { |
e6a9dde5 | 4104 | g_log<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
bb4bdbaf BH |
4105 | return 0; |
4106 | } | |
4107 | catch(std::exception &e) { | |
e6a9dde5 | 4108 | g_log<<Logger::Error<<"STL Exception: "<<e.what()<<endl; |
bb4bdbaf BH |
4109 | return 0; |
4110 | } | |
4111 | catch(...) { | |
e6a9dde5 | 4112 | g_log<<Logger::Error<<"any other exception in main: "<<endl; |
bb4bdbaf BH |
4113 | return 0; |
4114 | } | |
4115 | ||
51e2144e | 4116 | |
3ddb9247 | 4117 | int main(int argc, char **argv) |
288f4aa9 | 4118 | { |
dbd23fc2 BH |
4119 | g_argc = argc; |
4120 | g_argv = argv; | |
5e3de507 | 4121 | g_stats.startupTime=time(0); |
3e135495 | 4122 | versionSetProduct(ProductRecursor); |
8a63d3ce | 4123 | reportBasicTypes(); |
0007c2e5 | 4124 | reportOtherTypes(); |
ea634573 | 4125 | |
22030c37 | 4126 | int ret = EXIT_SUCCESS; |
caa6eefa | 4127 | |
288f4aa9 | 4128 | try { |
f888311c | 4129 | ::arg().set("stack-size","stack size per mthread")="200000"; |
2e3d8a19 | 4130 | ::arg().set("soa-minimum-ttl","Don't change")="0"; |
2e3d8a19 | 4131 | ::arg().set("no-shuffle","Don't change")="off"; |
2e3d8a19 | 4132 | ::arg().set("local-port","port to listen on")="53"; |
32252594 | 4133 | ::arg().set("local-address","IP addresses to listen on, separated by spaces or commas. Also accepts ports.")="127.0.0.1"; |
fec7dd5a | 4134 | ::arg().setSwitch("non-local-bind", "Enable binding to non-local addresses by using FREEBIND / BINDANY socket options")="no"; |
77499b05 | 4135 | ::arg().set("trace","if we should output heaps of logging. set to 'fail' to only log failing domains")="off"; |
a6415142 | 4136 | ::arg().set("dnssec", "DNSSEC mode: off/process-no-validate (default)/process/log-fail/validate")="process-no-validate"; |
c87e1876 | 4137 | ::arg().set("dnssec-log-bogus", "Log DNSSEC bogus validations")="no"; |
13c46e62 | 4138 | ::arg().set("signature-inception-skew", "Allow the signature inception to be off by this number of seconds")="60"; |
d3f809bf | 4139 | ::arg().set("daemon","Operate as a daemon")="no"; |
191f2e47 | 4140 | ::arg().setSwitch("write-pid","Write a PID file")="yes"; |
9afa8662 | 4141 | ::arg().set("loglevel","Amount of logging. Higher is more. Do not set below 3")="6"; |
b6cfa948 | 4142 | ::arg().set("disable-syslog","Disable logging to syslog, useful when running inside a supervisor that logs stdout")="no"; |
b18fa400 | 4143 | ::arg().set("log-timestamp","Print timestamps in log lines, useful to disable when running with a tool that timestamps stdout already")="yes"; |
22e0810c | 4144 | ::arg().set("log-common-errors","If we should log rather common errors")="no"; |
2e3d8a19 BH |
4145 | ::arg().set("chroot","switch to chroot jail")=""; |
4146 | ::arg().set("setgid","If set, change group id to this gid for more security")=""; | |
4147 | ::arg().set("setuid","If set, change user id to this uid for more security")=""; | |
c83ee49d | 4148 | ::arg().set("network-timeout", "Wait this number of milliseconds for network i/o")="1500"; |
bb4bdbaf | 4149 | ::arg().set("threads", "Launch this number of threads")="2"; |
b243ca3b | 4150 | ::arg().set("distributor-threads", "Launch this number of distributor threads, distributing queries to other threads")="0"; |
adabfcb9 | 4151 | ::arg().set("processes", "Launch this number of processes (EXPERIMENTAL, DO NOT CHANGE)")="1"; // if we un-experimental this, need to fix openssl rand seeding for multiple PIDs! |
5124de27 | 4152 | ::arg().set("config-name","Name of this virtual configuration - will rename the binary image")=""; |
d07bf7ff | 4153 | ::arg().set("api-config-dir", "Directory where REST API stores config and zones") = ""; |
479e0976 | 4154 | ::arg().set("api-key", "Static pre-shared authentication key for access to the REST API") = ""; |
479e0976 | 4155 | ::arg().setSwitch("webserver", "Start a webserver (for REST API)") = "no"; |
d07bf7ff PL |
4156 | ::arg().set("webserver-address", "IP Address of webserver to listen on") = "127.0.0.1"; |
4157 | ::arg().set("webserver-port", "Port of webserver to listen on") = "8082"; | |
4158 | ::arg().set("webserver-password", "Password required for accessing the webserver") = ""; | |
be3e1477 | 4159 | ::arg().set("webserver-allow-from","Webserver access is only allowed from these subnets")="127.0.0.1,::1"; |
cc08b5a9 | 4160 | ::arg().set("carbon-ourname", "If set, overrides our reported hostname for carbon stats")=""; |
e12f8407 | 4161 | ::arg().set("carbon-server", "If set, send metrics in carbon (graphite) format to this server IP address")=""; |
2c78bd57 | 4162 | ::arg().set("carbon-interval", "Number of seconds between carbon (graphite) updates")="30"; |
f7a645ec RG |
4163 | ::arg().set("carbon-namespace", "If set overwrites the first part of the carbon string")="pdns"; |
4164 | ::arg().set("carbon-instance", "If set overwrites the the instance name default")="recursor"; | |
4165 | ||
0ec489bf | 4166 | ::arg().set("statistics-interval", "Number of seconds between printing of recursor statistics, 0 to disable")="1800"; |
c038218b | 4167 | ::arg().set("quiet","Suppress logging of questions and answers")=""; |
f27e6356 | 4168 | ::arg().set("logging-facility","Facility to log messages as. 0 corresponds to local0")=""; |
2e3d8a19 | 4169 | ::arg().set("config-dir","Location of configuration directory (recursor.conf)")=SYSCONFDIR; |
fdbf35ac BH |
4170 | ::arg().set("socket-owner","Owner of socket")=""; |
4171 | ::arg().set("socket-group","Group of socket")=""; | |
4172 | ::arg().set("socket-mode", "Permissions for socket")=""; | |
3ddb9247 | 4173 | |
f0f3f0b0 | 4174 | ::arg().set("socket-dir",string("Where the controlsocket will live, ")+LOCALSTATEDIR+" when unset and not chrooted" )=""; |
2e3d8a19 BH |
4175 | ::arg().set("delegation-only","Which domains we only accept delegations from")=""; |
4176 | ::arg().set("query-local-address","Source IP address for sending queries")="0.0.0.0"; | |
d4fb76e9 | 4177 | ::arg().set("query-local-address6","Source IPv6 address for sending queries. IF UNSET, IPv6 WILL NOT BE USED FOR OUTGOING QUERIES")=""; |
2e3d8a19 | 4178 | ::arg().set("client-tcp-timeout","Timeout in seconds when talking to TCP clients")="2"; |
85c32340 | 4179 | ::arg().set("max-mthreads", "Maximum number of simultaneous Mtasker threads")="2048"; |
2e3d8a19 | 4180 | ::arg().set("max-tcp-clients","Maximum number of simultaneous TCP clients")="128"; |
324dc148 | 4181 | ::arg().set("server-down-max-fails","Maximum number of consecutive timeouts (and unreachables) to mark a server as down ( 0 => disabled )")="64"; |
979edd70 | 4182 | ::arg().set("server-down-throttle-time","Number of seconds to throttle all queries to a server after being marked as down")="60"; |
2e3d8a19 | 4183 | ::arg().set("hint-file", "If set, load root hints from this file")=""; |
b45eb27c | 4184 | ::arg().set("max-cache-entries", "If set, maximum number of entries in the main cache")="1000000"; |
a9af3782 | 4185 | ::arg().set("max-negative-ttl", "maximum number of seconds to keep a negative cached entry in memory")="3600"; |
c3e753c7 | 4186 | ::arg().set("max-cache-ttl", "maximum number of seconds to keep a cached entry in memory")="86400"; |
1051f8a9 | 4187 | ::arg().set("packetcache-ttl", "maximum number of seconds to keep a cached entry in packetcache")="3600"; |
927c12b0 | 4188 | ::arg().set("max-packetcache-entries", "maximum number of entries to keep in the packetcache")="500000"; |
1051f8a9 | 4189 | ::arg().set("packetcache-servfail-ttl", "maximum number of seconds to keep a cached servfail entry in packetcache")="60"; |
950626be | 4190 | ::arg().set("server-id", "Returned when queried for 'id.server' TXT or NSID, defaults to hostname, set custom or 'disabled'")=""; |
92011b8f | 4191 | ::arg().set("stats-ringbuffer-entries", "maximum number of packets to store statistics for")="10000"; |
ba1a571d | 4192 | ::arg().set("version-string", "string reported on version.pdns or version.bind")=fullVersionString(); |
49a699c4 | 4193 | ::arg().set("allow-from", "If set, only allow these comma separated netmasks to recurse")=LOCAL_NETS; |
2c95fc65 | 4194 | ::arg().set("allow-from-file", "If set, load allowed netmasks from this file")=""; |
51e2144e | 4195 | ::arg().set("entropy-source", "If set, read entropy from this file")="/dev/urandom"; |
3ddb9247 | 4196 | ::arg().set("dont-query", "If set, do not query these netmasks for DNS data")=DONT_QUERY; |
4e120339 | 4197 | ::arg().set("max-tcp-per-client", "If set, maximum number of TCP sessions per client (IP address)")="0"; |
fde296a3 | 4198 | ::arg().set("max-tcp-queries-per-connection", "If set, maximum number of TCP queries in a TCP connection")="0"; |
0d5f0a9f | 4199 | ::arg().set("spoof-nearmiss-max", "If non-zero, assume spoofing after this many near misses")="20"; |
4ef015cd | 4200 | ::arg().set("single-socket", "If set, only use a single socket for outgoing queries")="off"; |
5605c067 | 4201 | ::arg().set("auth-zones", "Zones for which we have authoritative data, comma separated domain=file pairs ")=""; |
3e61e7f7 | 4202 | ::arg().set("lua-config-file", "More powerful configuration options")=""; |
644dd1da | 4203 | |
5605c067 | 4204 | ::arg().set("forward-zones", "Zones for which we forward queries, comma separated domain=ip pairs")=""; |
927c12b0 BH |
4205 | ::arg().set("forward-zones-recurse", "Zones for which we forward queries with recursion bit, comma separated domain=ip pairs")=""; |
4206 | ::arg().set("forward-zones-file", "File with (+)domain=ip pairs for forwarding")=""; | |
5605c067 | 4207 | ::arg().set("export-etc-hosts", "If we should serve up contents from /etc/hosts")="off"; |
ac0b4eb3 | 4208 | ::arg().set("export-etc-hosts-search-suffix", "Also serve up the contents of /etc/hosts with this suffix")=""; |
3ea54bf0 | 4209 | ::arg().set("etc-hosts-file", "Path to 'hosts' file")="/etc/hosts"; |
e498dac1 | 4210 | ::arg().set("serve-rfc1918", "If we should be authoritative for RFC 1918 private IP space")="yes"; |
4485aa35 | 4211 | ::arg().set("lua-dns-script", "Filename containing an optional 'lua' script that will be used to modify dns answers")=""; |
a2f87dd1 | 4212 | ::arg().set("lua-maintenance-interval", "Number of seconds between calls to the lua user defined maintenance() function")="1"; |
08f3f638 | 4213 | ::arg().set("latency-statistic-size","Number of latency values to calculate the qa-latency average")="10000"; |
3ddb9247 | 4214 | ::arg().setSwitch( "disable-packetcache", "Disable packetcache" )= "no"; |
35695d18 | 4215 | ::arg().set("ecs-ipv4-bits", "Number of bits of IPv4 address to pass for EDNS Client Subnet")="24"; |
4216 | ::arg().set("ecs-ipv6-bits", "Number of bits of IPv6 address to pass for EDNS Client Subnet")="56"; | |
3f975863 | 4217 | ::arg().set("edns-subnet-whitelist", "List of netmasks and domains that we should enable EDNS subnet for")=""; |
2fe3354d | 4218 | ::arg().set("ecs-add-for", "List of client netmasks for which EDNS Client Subnet will be added")="0.0.0.0/0, ::/0, " LOCAL_NETS_INVERSE; |
8a3a3822 | 4219 | ::arg().set("ecs-scope-zero-address", "Address to send to whitelisted authoritative servers for incoming queries with ECS prefix-length source of 0")=""; |
a16c4536 | 4220 | ::arg().setSwitch( "use-incoming-edns-subnet", "Pass along received EDNS Client Subnet information")="no"; |
e498dac1 | 4221 | ::arg().setSwitch( "pdns-distributes-queries", "If PowerDNS itself should distribute queries over threads")="yes"; |
4ca2d205 | 4222 | ::arg().setSwitch( "root-nx-trust", "If set, believe that an NXDOMAIN from the root means the TLD does not exist")="yes"; |
e661a20b | 4223 | ::arg().setSwitch( "any-to-tcp","Answer ANY queries with tc=1, shunting to TCP" )="no"; |
b3adda56 | 4224 | ::arg().setSwitch( "lowercase-outgoing","Force outgoing questions to lowercase")="no"; |
00b8cadc | 4225 | ::arg().setSwitch("gettag-needs-edns-options", "If EDNS Options should be extracted before calling the gettag() hook")="no"; |
54c36063 PL |
4226 | ::arg().set("udp-truncation-threshold", "Maximum UDP response size before we truncate")="1232"; |
4227 | ::arg().set("edns-outgoing-bufsize", "Outgoing EDNS buffer size")="1232"; | |
aadceba8 | 4228 | ::arg().set("minimum-ttl-override", "Set under adverse conditions, a minimum TTL")="0"; |
173d790e | 4229 | ::arg().set("max-qperq", "Maximum outgoing queries per query")="50"; |
c5950146 | 4230 | ::arg().set("max-total-msec", "Maximum total wall-clock time per query in milliseconds, 0 for unlimited")="7000"; |
7c3398aa | 4231 | ::arg().set("max-recursion-depth", "Maximum number of internal recursion calls per query, 0 for unlimited")="40"; |
78227847 | 4232 | ::arg().set("max-udp-queries-per-round", "Maximum number of UDP queries processed per recvmsg() round, before returning back to normal processing")="10000"; |
a09a8ce0 | 4233 | |
68e6df3c | 4234 | ::arg().set("include-dir","Include *.conf files from this directory")=""; |
d67620e4 | 4235 | ::arg().set("security-poll-suffix","Domain name from which to query security update notifications")="secpoll.powerdns.com."; |
2332f42d | 4236 | |
4237 | ::arg().setSwitch("reuseport","Enable SO_REUSEPORT allowing multiple recursors processes to listen to 1 address")="no"; | |
2e3d8a19 | 4238 | |
d705aad9 | 4239 | ::arg().setSwitch("snmp-agent", "If set, register as an SNMP agent")="no"; |
396f126e | 4240 | ::arg().set("snmp-master-socket", "If set and snmp-agent is set, the socket to use to register to the SNMP master")=""; |
d705aad9 | 4241 | |
0735b17e | 4242 | ::arg().set("tcp-fast-open", "Enable TCP Fast Open support on the listening sockets, using the supplied numerical value as the queue size")="0"; |
d377bb54 | 4243 | ::arg().set("nsec3-max-iterations", "Maximum number of iterations allowed for an NSEC3 record")="2500"; |
0735b17e | 4244 | |
8fd25133 RG |
4245 | ::arg().set("cpu-map", "Thread to CPU mapping, space separated thread-id=cpu1,cpu2..cpuN pairs")=""; |
4246 | ||
98d36505 RG |
4247 | ::arg().setSwitch("log-rpz-changes", "Log additions and removals to RPZ zones at Info level")="no"; |
4248 | ||
5cc8371b | 4249 | ::arg().set("xpf-allow-from","XPF information is only processed from these subnets")=""; |
59cb4a79 | 4250 | ::arg().set("xpf-rr-code","XPF option code to use")="0"; |
5cc8371b | 4251 | |
58da9034 | 4252 | ::arg().set("udp-source-port-min", "Minimum UDP port to bind on")="1024"; |
b47026fd CHB |
4253 | ::arg().set("udp-source-port-max", "Maximum UDP port to bind on")="65535"; |
4254 | ::arg().set("udp-source-port-avoid", "List of comma separated UDP port number to avoid")="11211"; | |
e97cb679 | 4255 | ::arg().set("rng", "Specify random number generator to use. Valid values are auto,sodium,openssl,getrandom,arc4random,urandom.")="auto"; |
d6f3fcfa | 4256 | ::arg().set("public-suffix-list-file", "Path to the Public Suffix List file, if any")=""; |
af1377b7 NC |
4257 | #ifdef NOD_ENABLED |
4258 | ::arg().set("new-domain-tracking", "Track newly observed domains (i.e. never seen before).")="no"; | |
4259 | ::arg().set("new-domain-log", "Log newly observed domains.")="yes"; | |
4260 | ::arg().set("new-domain-lookup", "Perform a DNS lookup newly observed domains as a subdomain of the configured domain")=""; | |
4261 | ::arg().set("new-domain-history-dir", "Persist new domain tracking data here to persist between restarts")=string(NODCACHEDIR)+"/nod"; | |
4262 | ::arg().set("new-domain-whitelist", "List of domains (and implicitly all subdomains) which will never be considered a new domain")=""; | |
b78727c6 | 4263 | ::arg().set("new-domain-db-size", "Size of the DB used to track new domains in terms of number of cells. Defaults to 67108864")="67108864"; |
ca2526f5 | 4264 | ::arg().set("new-domain-pb-tag", "If protobuf is configured, the tag to use for messages containing newly observed domains. Defaults to 'pdns-nod'")="pdns-nod"; |
41c542ec NC |
4265 | ::arg().set("unique-response-tracking", "Track unique responses (tuple of query name, type and RR).")="no"; |
4266 | ::arg().set("unique-response-log", "Log unique responses")="yes"; | |
4267 | ::arg().set("unique-response-history-dir", "Persist unique response tracking data here to persist between restarts")=string(NODCACHEDIR)+"/udr"; | |
b78727c6 | 4268 | ::arg().set("unique-response-db-size", "Size of the DB used to track unique responses in terms of number of cells. Defaults to 67108864")="67108864"; |
ca2526f5 | 4269 | ::arg().set("unique-response-pb-tag", "If protobuf is configured, the tag to use for messages containing unique DNS responses. Defaults to 'pdns-udr'")="pdns-udr"; |
af1377b7 | 4270 | #endif /* NOD_ENABLED */ |
2e3d8a19 | 4271 | ::arg().setCmd("help","Provide a helpful message"); |
ba1a571d | 4272 | ::arg().setCmd("version","Print version string"); |
d5141417 | 4273 | ::arg().setCmd("config","Output blank configuration"); |
e6a9dde5 | 4274 | g_log.toConsole(Logger::Info); |
2e3d8a19 | 4275 | ::arg().laxParse(argc,argv); // do a lax parse |
c75a6a9e | 4276 | |
2d733c0f CH |
4277 | string configname=::arg()["config-dir"]+"/recursor.conf"; |
4278 | if(::arg()["config-name"]!="") { | |
4279 | configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf"; | |
5124de27 | 4280 | s_programname+="-"+::arg()["config-name"]; |
2d733c0f CH |
4281 | } |
4282 | cleanSlashes(configname); | |
5124de27 | 4283 | |
5cc1ea1d CH |
4284 | if(!::arg().getCommands().empty()) { |
4285 | cerr<<"Fatal: non-option on the command line, perhaps a '--setting=123' statement missed the '='?"<<endl; | |
4286 | exit(99); | |
4287 | } | |
4288 | ||
577cf284 BH |
4289 | if(::arg().mustDo("config")) { |
4290 | cout<<::arg().configstring()<<endl; | |
4291 | exit(0); | |
4292 | } | |
4293 | ||
3ddb9247 | 4294 | if(!::arg().file(configname.c_str())) |
e6a9dde5 | 4295 | g_log<<Logger::Warning<<"Unable to parse configuration file '"<<configname<<"'"<<endl; |
c75a6a9e | 4296 | |
2e3d8a19 | 4297 | ::arg().parse(argc,argv); |
c836dc19 | 4298 | |
2054afbb CH |
4299 | if( !::arg()["chroot"].empty() && !::arg()["api-config-dir"].empty() ) { |
4300 | g_log<<Logger::Error<<"Using chroot and enabling the API is not possible"<<endl; | |
f0f3f0b0 PL |
4301 | exit(EXIT_FAILURE); |
4302 | } | |
4303 | ||
4304 | if (::arg()["socket-dir"].empty()) { | |
4305 | if (::arg()["chroot"].empty()) | |
4306 | ::arg().set("socket-dir") = LOCALSTATEDIR; | |
4307 | else | |
4308 | ::arg().set("socket-dir") = "/"; | |
4309 | } | |
4310 | ||
2e3d8a19 | 4311 | ::arg().set("delegation-only")=toLower(::arg()["delegation-only"]); |
562588a3 | 4312 | |
b243ca3b RG |
4313 | if(::arg().asNum("threads")==1) { |
4314 | if (::arg().mustDo("pdns-distributes-queries")) { | |
4315 | g_log<<Logger::Warning<<"Only one thread, no need to distribute queries ourselves"<<endl; | |
4316 | ::arg().set("pdns-distributes-queries")="no"; | |
4317 | } | |
4318 | } | |
4319 | ||
4320 | if(::arg().mustDo("pdns-distributes-queries") && ::arg().asNum("distributor-threads") <= 0) { | |
4321 | g_log<<Logger::Warning<<"Asked to run with pdns-distributes-queries set but no distributor threads, raising to 1"<<endl; | |
4322 | ::arg().set("distributor-threads")="1"; | |
4323 | } | |
4324 | ||
4325 | if (!::arg().mustDo("pdns-distributes-queries")) { | |
4326 | ::arg().set("distributor-threads")="0"; | |
4327 | } | |
61d74169 | 4328 | |
2e3d8a19 | 4329 | if(::arg().mustDo("help")) { |
ff5ba4f9 WA |
4330 | cout<<"syntax:"<<endl<<endl; |
4331 | cout<<::arg().helpstring(::arg()["help"])<<endl; | |
4332 | exit(0); | |
b636533b | 4333 | } |
5e3de507 | 4334 | if(::arg().mustDo("version")) { |
ba1a571d | 4335 | showProductVersion(); |
3613a51c | 4336 | showBuildConfiguration(); |
67076869 | 4337 | exit(0); |
5e3de507 | 4338 | } |
b636533b | 4339 | |
34162f8f | 4340 | Logger::Urgency logUrgency = (Logger::Urgency)::arg().asNum("loglevel"); |
f48d7b65 | 4341 | |
34162f8f CH |
4342 | if (logUrgency < Logger::Error) |
4343 | logUrgency = Logger::Error; | |
f48d7b65 | 4344 | if(!g_quiet && logUrgency < Logger::Info) { // Logger::Info=6, Logger::Debug=7 |
4345 | logUrgency = Logger::Info; // if you do --quiet=no, you need Info to also see the query log | |
4346 | } | |
e6a9dde5 PL |
4347 | g_log.setLoglevel(logUrgency); |
4348 | g_log.toConsole(logUrgency); | |
34162f8f | 4349 | |
f7c1d4e3 | 4350 | serviceMain(argc, argv); |
288f4aa9 | 4351 | } |
3f81d239 | 4352 | catch(PDNSException &ae) { |
e6a9dde5 | 4353 | g_log<<Logger::Error<<"Exception: "<<ae.reason<<endl; |
22030c37 | 4354 | ret=EXIT_FAILURE; |
288f4aa9 | 4355 | } |
fdbf35ac | 4356 | catch(std::exception &e) { |
e6a9dde5 | 4357 | g_log<<Logger::Error<<"STL Exception: "<<e.what()<<endl; |
22030c37 | 4358 | ret=EXIT_FAILURE; |
288f4aa9 BH |
4359 | } |
4360 | catch(...) { | |
e6a9dde5 | 4361 | g_log<<Logger::Error<<"any other exception in main: "<<endl; |
22030c37 | 4362 | ret=EXIT_FAILURE; |
288f4aa9 | 4363 | } |
3ddb9247 | 4364 | |
22030c37 | 4365 | return ret; |
288f4aa9 | 4366 | } |